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InterviewSolution
This section includes InterviewSolutions, each offering curated multiple-choice questions to sharpen your knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
Denote the following timings in a.m and p.m.1. 10:15 morning2. 8:10 night3. 1:45 afternoon4. 4:30 morning5. 9:45 night6. 5:35 evening |
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Answer» 1. 10:15 morning 10.15 A.M 2. 8:10 night 8.10 P.M 3. 1:45 afternoon 1.45 P.M 4. 4:30 morning 4.30 A.M 5. 9:45 night 9.45 P.M 6. 5:35 evening 5.35 P.M |
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| 2. |
Identify true and false statements(1) On subtracting 1 minute 40 seconds from 3 minutes 10 seconds we get 1 minute 20 seconds.(2) 4 hours = 240 minutes.(3) The dial of a watch is divided into 12 big parts.(4) Smallest unit of time measurement is minute. |
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Answer» (1) False (2) True (3) True (4) False |
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| 3. |
At what time do you get up in the morning? |
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Answer» I wake up at 6:30 AM morning. |
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| 4. |
A and B can finish a piece of work in 16 days and 12 days respectively. A started the work and worked at it for 2 days. He was then joined by B. Find the total time taken to finish the work. |
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Answer» we know that, Number of days A required to do piece of work = 16 days Number of days B required to do piece of work = 12 days ∴ We can calculate, work done by A in 1 day = 1/16 Work done by B in 1 day = 1/12 A alone works for 2 days and the work completed by A in 2 days = 2 × 1/16 = 1/8 ∴ work left = 1- 1/8 = 7/8 Work done by A, B together in a one day = 1/16 + 1/12 = 7/48 ∴ they can work together in 48/7 days But 7/8th work is completed by both A and B ∴ time required to complete 7/8th work together by A and B = 7/8 × 48/7 = 6 days Time taken to finish the work = 6 + 2 = 8 days(2 is added because 1/8 work is done by A alone) ∴ Total time taken to complete the work = 8 days. |
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| 5. |
Ravi can do a piece of work in 15 hours while Raman can do it in 12 hours. How long will both take to do it, working together? |
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Answer» we know that, Number of hours Ravi required to do piece of work = 15 hours Number of hours Raman required to do piece of work = 12 hours ∴ We can calculate, work done by Ravi in 1 day = 1/15 Work done by Raman in 1 day = 1/12 Now, work done by both Ravi and Raman together in 1 hour= 1/15 + 1/12 = 9/60 = 3/20 ∴ They can do work together in 20/3 hours = 6 2/3 hours = 6 hours 40 minutes |
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| 6. |
Rajan can do a piece of work in 24 days while Amit can do it in 30 days. In how many days can they complete it, if they work together? |
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Answer» We know that, Number of days Rajan required to do piece of work = 24 days Number of days Amit required to do piece of work = 30 days ∴ We can calculate, work done by Rajan in 1 day = 1/24 Work done by Amit in 1 day = 1/30 Now, work done by both Rajan and Amit together in 1 day= 1/24 + 1/30 = 54/720 = 3/40 ∴ they can do work together in 40/3 days = 13 1/3 days |
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| 7. |
A and B can do a piece of work in 12 days; B and C in 15 days; C and A in 20 days. How much time will A alone take to finish the work? |
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Answer» The given details are, A and B can do a piece of work in = 12 days Work done by A and B in 1 day = 1/12 B and C can do a piece of work in = 15 days Work done by B and C in 1 day = 1/15 A and C can do a piece of work in = 20 days Work done by A and C in 1 day = 1/20 By adding A, B and C we get, 2(A+B+C)’s one day work = 1/12 + 1/15 + 1/20 = (5+4+3)/60 (by taking LCM for 12, 15 and 20 which is 60) = 12/60 = 1/5 A+B+C one day work = 1/(5×2) = 1/10 We know that, A’s 1 day work = (A+B+C)’s 1 day work – (B+C)’s 1 day work = 1/10 – 1/15 = (3-2)/30 (by taking LCM for 10 and 15 which is 30) = 1/30 ∴ A alone can finish the work in = 1/(1/30) = 30days. |
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| 8. |
A works twice as fast as B. If both of them can together finish a piece of work in 12 days. Then B alone can do it in24 days27 days36 days48 days |
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Answer» we know that, Work done by A in 1 day = 2x Let us consider work done by B in 1 day = x Number of days A and B together required to complete a piece of work = 12 days Now, work done by both A and B together in 1 day= 1/12 ∴ 2x + x = 1/12 3x = 1/12 x = 1/36 ∴ B can do work in 36 days |
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| 9. |
A can do a piece of work in 24 hours while B alone can do it in 16 hours. If A, B and C working together can finish it in 8 hours, in how many hours can C alone finish the work? |
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Answer» we know that, Number of hours A required to do piece of work = 24 hours Number of hour B required to do piece of work = 16 hours Let us consider number of hours C required to do piece of work = x hours Number of hours A,B and C together required to do piece of work = 8 hours ∴ We can calculate, work done by A in 1 hour = 1/24 Work done by B in 1 hour = 1/16 Work done by C in 1 hour = 1/x Work done by A, B and C together in a one hour = 1/8 Now, work done by A,B and C together in 1 hour= 1/24 + 1/16 +1/x = 5/48 + 1/x 5/48 + 1/x = 1/8 (5x+48)/48x = 1/8 40x + 384 = 48x 8x = 384 x = 384/8 = 48 ∴ C can do the work in 48 hours. |
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| 10. |
Mohan takes 9 hours to mow a large lawn. He and Sohan together can mow in 4 hours. How long will Sohan take to mow the lawn if he works alone? |
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Answer» The given details are, Mohan can mow a lawn in 9 hours. Work done by Mohan in 1 hour = 1/9 Mohan and Sohan can mow the lawn together in = 4 hours Work done by Mohan and Sohan together in 1 hour = 1/4 We know that, Work done by Sohan in 1 hour = (work done by together in 1 hour) – (work done by Mohan in 1 hr) = 1/4 – 1/9 = (9-4)/36 (by taking LCM for 4 and 9 which is 36) = 5/36 ∴ Time taken by Sohan to complete the work = 1/(5/36) = 36/5hours. |
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| 11. |
A can do a job in 16 days and B can do the same job in 12 days. With the help of C. they can finish the job in 6 days only. Then, C alone can finish it in34 days22 days36 days48 days |
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Answer» we know that, Number of hours A required to do piece of work = 16 days Number of hour B required to do piece of work = 12 days Let us consider number of days C required to do piece of work = x days Number of hours A,B and C together required to do piece of work = 6 days ∴ We can calculate, work done by A in 1 day = 1/16 Work done by B in 1 day = 1/12 Work done by C in 1 day = 1/x Work done by A, B and C together in a 1 day = 1/6 Now, work done by A,B and C together in 1 day = 1/16 + 1/12 +1/x = 7/48 + 1/x 7/48 + 1/x = 1/6 (7x+48)/48x = 1/6 42x + 288 = 48x 6x = 288 x = 288/6 = 48 ∴ C can do the work in 48 days. |
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| 12. |
If 12 boys earn Rs 840 in 7 days, what will 15 boys earn in 6 days? |
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Answer» The given details are, Earning of 12 boys in 7 days = Rs 840 Earning of 12 boys in 1 day = Rs 840/7 = Rs 120 Earning of 1 boy in 1 day = 120/12 = Rs 10 Earning of 1 boy in 6 days = 10 × 6 = Rs 60 ∴ Earning of 15 boys in 6 days = 60 × 15 = Rs 900 |
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| 13. |
If 25 men earn Rs 1000 in 10 days, how much will 15 men earn in 15 days? |
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Answer» The given details are, In 10 days 25 men can earn = Rs.1000 In 1 day 25 men can earn = 1000/10 = Rs 100 In 1 day 1 man can earn = 100/25 = Rs 4 In 15 days 1 man can earn = 15 × 4 = Rs 60 ∴ In 15 days 15 men can earn = 60 × 15 = Rs 900 |
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| 14. |
Rohan can paint 1/3 of a painting in 6 days. How many days will he take to complete painting? |
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Answer» The given details are, Number of days taken by Rohan for painting 1/3 of painting is 6 days Number of days taken by Rohan to complete the painting = 6/(1/3) = 6 × 3 = 18 ∴ Rohan can complete painting in 18 days. |
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| 15. |
Rakesh can do a piece of work in 20 days. How much work can he do in 4 days? |
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Answer» The given details are, Time taken by Rakesh to do a piece of work is 20 days Work done by Rakesh in 1 day = 1/20 Work done by Rakesh in 4 days = 4 × 1/20 = 1/5 ∴ 1/5th work can be done by Rakesh in 4days. |
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| 16. |
Two taps A and B can fill an overhead tank in 10 hours and 15 hours respectively. Both the taps are opened for 4 hours and then B is turned off. How much time will A take to fill the remaining tank? |
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Answer» The given details are, Tap A can fill the tank in = 10 hours Tap A can fill the tank in 1 hour = 1/10 Tap B can fill the tank in = 15 hours Tap B can fill the tank in 1 hour = 1/15 Both taps together can fill the tank in 1 hour = 1/10 + 1/15 = (3+2)/30 = 5/30 = 1/6 Both taps together can fill the tank in 4 hours = 4 × 1/6 = 2/3 Remaining tank to be filled = 1 – 2/3 = (3-2)/3 = 1/3 ∴ Time taken by A to fill the remaining tank = (1/3)/(1/10) = 10/3 = 3 1/3 hours |
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| 17. |
How many days are there in a year? |
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Answer» 365 days are there in a year. |
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| 18. |
What do you mean by leap year? |
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Answer» The year in which there are 29 days in February is called leap year. |
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| 19. |
Seconds in 18 minutes are(a) 108 seconds(b) 180 seconds(c) 1080 seconds(d) 1800 seconds |
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Answer» Seconds in 18 minutes are 1080 seconds. |
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| 20. |
How many seconds are there in 7 minutes? |
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Answer» 1 minute = 60 seconds Therefore, 7 minutes = 7 × 60 seconds = 420 seconds. |
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| 21. |
In 310 minutes(a) 3 hours 10 minutes(b) 310 seconds(c) 310 hours(d) 5 hours 10 minutes |
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Answer» In 310 minutes 5 hours 10 minutes. |
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| 22. |
How many seconds make 1 hour? |
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Answer» 1 hr = 60 min 1 min = 60 sec 1 hr = 60 × 60 1 hr = 3600 sec |
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| 23. |
How many seconds make 5 minutes? |
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Answer» 1 min = 60 sec 5 min = 60 × 5 = 300 sec |
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| 24. |
How many minutes are there in 10 hours? |
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Answer» 10 hr = 60 min = 60 × 10 = 600 min |
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| 25. |
How many hours are there in a day? |
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Answer» 24 hours re there in a day. |
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| 26. |
A school closes for mid-term vacation on October 3rd and reopens on October 31st. How many days has the school closed for midterm vacation? |
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Answer» A school classes for midterm vacation on October 3rd The school re-open on October 31st 31st of October 3rd of October 28 The school closed for midterm vacation = 28 days |
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| 27. |
Find out the railway clock time for 5:30 p.m. |
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Answer» 5.30 P.M – 17.30 hrs |
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| 28. |
Two motor mechanics, Raju and Siraj, working together can overhaul a scooter in 6 hours. Raju alone can do the job in 15 hours. In how many hours can Siraj alone do it? |
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Answer» we know that, Number of hours Raju required to overhaul the scooter = 15 hours Let us consider number of hours Sriraj to overhaul the scooter = X hours Number of hours required by Raju and Sriraj together to do piece of work = 6 hours ∴ We can calculate, work done by Raju in 1 hour = 1/15 Work done by Sriraj in 1 hour = 1/x Work done by both Raju and Sriraj in a hour = 1/6 Work done by both Raju and Sriraj in 1 hour= 1/15 + 1/x = x+15/15x x+15/15x = 1/6 6x + 90 = 15x 9x = 90 x = 90/9 x = 10 ∴ Sriraj can do the work in 10 hours. |
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| 29. |
How many days are there in a week? |
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Answer» 7 days are there in a week. |
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| 30. |
How many seconds make 1 minute? |
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Answer» 60 seconds make 1 minute. |
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| 31. |
How many minutes make 1 hour? |
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Answer» 60 minutes make 1 hour. |
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| 32. |
How many days are there in February? |
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Answer» 28 days of February. |
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| 33. |
How many days are there in a month? |
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Answer» 30 days are there in a month. |
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| 34. |
Total seconds in one hour is(a) 3600 seconds(b) 360 seconds(c) 60 seconds(d) 1200 seconds |
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Answer» Total seconds in one hour is 3600 seconds. |
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| 35. |
Convert 4 hour into minute. |
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Answer» 4 hours = 1 hour + 1 hour + 1 hour + 1 hour = 60 minutes + 60 minutes + 60 minutes + 60 minute = 240 minute = 4 × 60 minutes or = 240 minutes |
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| 36. |
Total minutes in 2 hour 30 minute(a) 150(b) 120(c) 60(d) 180 |
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Answer» Total minutes in 2 hour 30 minute is 150. |
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| 37. |
Convert 3 minutes in to seconds. |
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Answer» To convert minute into second 3 minutes = 1 minute + 1 minute + 1 minute = 60 seconds + 60 seconds + 60 seconds = 180 seconds = 3 × 60 seconds. |
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| 38. |
Time of 60 minutes is called-(a) 1 minute(b) 1 second(c) 1 hour(d) None of the above |
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Answer» Time of 60 minutes is called 1 hour. |
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| 39. |
In the following fill in the blanks,1. The dial of a watch is divided into ……………… big parts.2. Smallest unit of time measurement is ……………… .3. Value of 60 seconds is equal to ……………… .4. To convert hour unit into minute unit multiply by ……………… .5. To convert hour unit into second unit multiply by ……………… . |
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Answer» 1. 12 2. seconds 3. 1 minute 4. 60 5. 3600 |
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| 40. |
Rohan takes 25 minutes to write a page then how much time he require to write 6 page ? |
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Answer» Time takes to write 1 page = 25 minute Therefore require to write 6 page = 25 × 6 minute = 150 minutes = 2 hour 30 minutes 150/60 = 2 hour 30 minutes. |
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| 41. |
It will take 15 minutes to watering a seed plot of a field then how long it will take to watering 5 such seed plots ? |
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Answer» Time taken to watering one seed plot = 15 minutes = 75 minute = 1 hour 15 minute Therefore time taken to watering 5 seed plots is 1 hour 15 minutes. |
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| 42. |
Convert the time units of following questions,1. 20 minutes = …………. seconds2. 6 1/2 minutes = …………. seconds3. 15 1/4 minutes = …………. seconds4. 4 hour = …………. seconds5. 2 3/4 hour . seconds |
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Answer» 1. 20 minutes = 20 x 60 seconds 2. 6 1/2 minutes = 6 minute + 1/2 minute = 6 x 60 seconds + 1/2 x 60 seconds 3. 15 1/4 minutes = 15 minute + 1/4 minute = 15 x 60 seconds + 1/4 x 60 seconds 4. 4 hour = 4 x 60 minutes = 240 minute = 240 x 60 seconds 5. 2 3/4 hour = 2 hour + 3/4 hour = 2 x 60 minutes + 3/4 x 60 minutes |
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| 43. |
Convert the following hours into minutes1. 1 1/4 hour = …………. minutes2. 2 1/2 hour = …………. minutes3. 5 3/4 hour = …………. minutes4. 3 1/5 hour = …………. minutes |
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Answer» (1) 1 1/4 hour = 1 hour + 1/4 hour = 1 x 60 minutes + 1/4 x 60 minutes (2) 2 1/2 hour = 2 hour + 1/2 hour = 2 x 60 minutes + 1/2 x 60 minutes, (3) 5 3/4 hour = 5 hour + 3/4 hour = 5 x 60 minutes + 3/4 x 60 minutes (4) 3 1/5 hour = 3 hour + 1/5 hour = 3 x 60 minutes + 1/5 x 60 minutes |
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| 44. |
Yogesh has been studying for 5 hours 30 minute in school and 3 hours 45 minute at home. How much time is he studying per day. |
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Answer» Study in school = 5 hour 30 minutes Study at home = + 3 hour 45 minutes Total study = 8 hour 75 minutes 75 minutes = 60 minutes + 15 minutes = 1 hour 15 minutes i.e., 8 hour + 1 hour 15 minutes = 9 hour 15 minute |
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| 45. |
Convert 3 1/2 hour into minute unit. |
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Answer» 3 1/2 hours = 7/2 × 60 minutes = 210 minutes |
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| 46. |
Identify True and False.(i) We divide a minute by 60 to convert into seconds (Correct/False)(ii) One hour has 3600 seconds. (Correct/False)(iii) The time taken by the hands of minute to travel sixty small part is equal to the time taken by the hands of hour to travel a big part. (Correct/False)(iv) Half hour is equal to 15 minutes. (Correct/False) |
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Answer» (i) False (ii) Correct (iii) Correct (iv) False |
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| 47. |
A cistern has two inlets A and B which can fill it in 12 hours and 15 hours respectively. An outlet can empty the full cistern in 10 hours. If all the three pipes are opened together in the empty cistern, how much time will they take to fill the cistern completely? |
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Answer» The given details are, Inlet A can fill the cistern in = 12 hours Inlet A can fill the cistern in 1 hour = 1/12 Inlet B can fill the cistern in = 15 hours Inlet B can fill the cistern in 1 hour = 1/15 Outlet pipe can empty the cistern in = 10 hours Outlet pipe can empty the cistern in 1 hour = 1/10 So we have, (1/12 + 1/15) – 1/10 = (9/60) – 1/10 = (9-6)/60 = 3/60 = 1/20 part ∴ When all 3 pipes are opened together to empty the cistern, time taken to fill the cistern completly = 1/(1/20) = 20 hours |
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| 48. |
A pipe can fill a cistern in 10 hours. Due to a leak in the bottom it is filled in 12 hours. When the cistern is full, in how much time will it be emptied by the leak? |
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Answer» The given details are, When there is no leakage A pipe can fill the cistern in = 10 hours In 1 hour without leakage A pipe can fill the cistern in = 1/10 hours When there is leakage cistern gets filled in = 12 hours In 1 hour, when there is leakage cistern gets filled in = 1/12 hours In 1 hour, due to leakage cistern gets filled to = 1/10 – 1/12 = (12-10)/120 = 2/120 = 1/60 part ∴ Due to leakage the cistern gets emptied in = 1/(1/60) = 60 hours. |
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| 49. |
A cistern can be filled by one tap in 8 hours, and by another in 4 hours. How long will it take to fill the cistern if both taps are opened together? |
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Answer» The given details are, A cistern can be filled by one tap in = 8 hours A cistern filled by one tap in 1 hour = 1/8 Another cistern can be filled in = 4 hours Cistern filled by another tap in 1 hour = 1/4 Total cistern filled in 1 hour = 1/4 + 1/8 = (2+1)/8 = 3/8 ∴ Cistern can be filled when both the taps are opened together in = 8/3 = 2 2/3 hours |
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| 50. |
If 9 girls can prepare 135 garlands in 3 hours, how many girls are needed to prepare 270 garlands in 1 hour? |
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Answer» The given details are, In 3 hours, 9 Girls can prepare = 135 garlands In 1 hour, 9 girls can prepare = 135/3 = 45 garlands In 1 hour, 1 girl can prepare = 45/9 = 5 garlands ∴ In 1 hour, Number of girls required to prepare 270 garlands = 270/5 = 54 girls |
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