1907 + Interview Questions in Maths in Class 7

1.	Divide : 0.1575div0.21
Answer» ANSWER :0.75

Discussion

2.	If the cost of 6 1/4 m of cloth is Rs 1421 7/8then find thecostof 1 metre of cloth
Answer» ANSWER :`227""(1)/3`

Discussion

3.	Solve: 162.668 div 0.11
Answer» ANSWER :`1478.8`

Discussion

4.	Divide 0.5124 by 12.
Answer» ANSWER :0.0427

Discussion

5.	Sixteen men, working at 6 h a day, can do a piece of work in 15 days. In how many days can 18 men working at 10 h a day do the same work?
Answer» 18 10 16 8 Solution : `"We have " (M_(1)D_(1)H_(1))/(W_(1)) = (M_(2)D_(2)H_(2))/(W_(2))` `M_(1) = 16, D_(1) = 15, H_(1) = 6` `M_(2) = 18, D_(2) = ? H_(2) = 10 " and " W_(1) = W_(2) = 1` `(16 xx 15 xx 6)/(1) = (18 xx D_(2) xx 10)/(1)` `rArr D_(2) = (16 xx 15 xx 6)/(18 xx 10)` = 8 days Hence the correct option is (d).

Discussion

6.	Fill in the blanks. 850 mL = "___________"L
Answer» ANSWER :`0.85`

Discussion

7.	Two trains are travelling in opposite direction at 72 km/h and 90 km/h. They cross each in 16s. If the length of the slower trains is 320 m, then find the length of the faster train (in m).
Answer» 380 420 400 425 Solution :Relative speed = (72 + 80) km/h = 162 km/h `= 162 XX (5)/(18) = 45 " m/s"` TIME taken to cross each other `=(" Time sum of the lengths of two trains ")/("Relative speed")` `16 = (320 +T)/( 45) "" ("where 'T' be the length of the faster train")` 720 = 320 + T `THEREFORE T_(2) = 720-320 = 400m` Hence, the correct option is (c).

Discussion

8.	Solve : 5.763 div 1000
Answer» ANSWER :`0.0005763`

Discussion

9.	Write down the numerical as well as literal coefficient of each of the following monomials: -2p^(3)q^(2)
Answer» SOLUTION :N/A

Discussion

10.	Find the product 7(1)/(4)xx2(3)/(16)xx2(2)/(7)
Answer» ANSWER :`36 (1)/(4)`

Discussion

11.	Is 10.342xx10^(7) the standard form of a large number ?
Answer» ANSWER :`1.0342xx10^(8)`

Discussion

12.	What fraction is Rs. 1750 of 2800?
Answer» ANSWER :`5/8`

Discussion

13.	Divide : 0.63 div10
Answer» ANSWER :0.063

Discussion

14.	Find the reciprocal of 3/313
Answer» ANSWER :`104 (1)/(3)`

Discussion

15.	Meghna bought 6 (1)/(2)m of cloth for making curtains and 4 (2)/(5)m of cloth for making table cloth. How much cloth did she purchase in all? When she reached home she saw 3 (3)/(4)m of cloth for curtains was spoiled and 2 (1)/(5)m of table cloth was torn. How much cloth was she left with each for making curtains and table cloth?
Answer» Answer :`10 (9)/(10)`m ; `2 (3)/(4)`m for curtains; `2 (1)/(5)`m for table cloth

Discussion

16.	The shoe sizes of 30 players selected for interschool competitions are given below : {:("Shoe size"(x_(i)),7,10,9,8,5,11,6),("Number of players"(f_(i)),4,5,8,3,5,2,3):} Find the median of this frequency distribution.
Answer» ANSWER :8.5

Discussion

17.	By actural division , express each of the following asa repeating decimal : 101/15
Answer» ANSWER :`6.7bar3`

Discussion

18.	Naman has to serve 2 (3)/(4) litres of soft drink in cups of(1)/(8) litre. How many cups can he serve? Will there be any soft drink left over?
Answer» Answer :22 cups, no SOFT drink will be LEFT over

Discussion

19.	Write down the integers, if any, that do not have inverses under addition.
Answer» ANSWER :No such INTEGERS

Discussion

20.	Which central tendency has been used to arrive at the following statements? Mickey noticed that half of the chocolate brands in the store cost more than 22.
Answer» ANSWER :MEDIAN

Discussion

21.	320 g ="___________"kg
Answer» ANSWER :`0.32`

Discussion

22.	The meanof 9 numbers is 10. If one more number is added, the mean remains as 10. Find the number which is added.
Answer» ANSWER :10

Discussion

23.	Is there a triangle that does not have a rotational symmetry, but has a single line of symmetry ?
Answer» Answer :An ISOSCELES TRIANGLE has a SINGLE line of symmetry. But it does not have rotational symmetry.

Discussion

24.	ABCD is a square with sides 12 cm each. Find its perimeter and area. Cut off a rectangle measuring C 8cm 2 cm by 4 cm from a corner as shown in the figure. Find the perimeter and area of the new polygon thus formed.
Answer» ANSWER :136 sq.cm

Discussion

25.	Divide : 0.125 div 25
Answer» ANSWER :0.005

Discussion

26.	Find: b. 7 xx (5)/(49)
Answer» `(6)/(7)` `(5)/(8)` `(3)/(7)` `(5)/(7)` ANSWER :D

Discussion

27.	345 mL= "____________"L
Answer» ANSWER :`0.345`

Discussion

28.	Choose the correct pair where the difference of the two integers is -15.
Answer» `-8, 7` `30, -15` `40, -30` `-24, 10`

Discussion

29.	Solve the equationsand check your answer in the case: 6(3x+2)-5(6x-1)=3(x-8)-5(7x-6)=9x
Answer» ANSWER :X = -1

Discussion

30.	Solve: 5.502 div 2.16
Answer» ANSWER :`4.2`

Discussion

31.	Write the following statements in the form of equations. The sum of five times a number and 3 is 38.
Answer» ANSWER :5X + 3 = 38

Discussion

32.	Find the sum. 0.04 57 + 0.0072
Answer» `0.0529` `0.0829` `0.1529` `0.0929` ANSWER :A

Discussion

33.	Evaluate : ((3)/(4))^(2)
Answer» ANSWER :`(9)/(16)`

Discussion

34.	Find the area of a rhombus having each side equal to 20 cm and one of its diagonals equal to 24 cm .
Answer» ANSWER :`384cm^(2)`

Discussion

35.	Solve: 0.4 x + 2.7 =2.9 x-3.55
Answer» ANSWER :X =2.5

Discussion

36.	Evaluate the following: (30 div 2) div 3
Answer» ANSWER :5

Discussion

37.	Solve the equationsand check your answer in the case: x-(2x-(3x-4)/(7))= (4x-27)/(3)-3
Answer» ANSWER :X = 6

Discussion

38.	An equilateral triangle has three lines of symmetry, an isosceles triangle will have :
Answer» no LINE of SYMMETRY ONE line of symmetry two LINES of symmetry Three lines of symmetry

Discussion

39.	Evaluate: -799 div (-17)
Answer» ANSWER :47

Discussion

40.	Convert each of the following into a vulgar fraction : 0.bar6
Answer» ANSWER :`2/3`

Discussion

41.	Find the reciprocal of:(11)/(4)
Answer» ANSWER :`4/11`

Discussion

42.	What should be added to 7a-9b+13c to get 9a+b-c?
Answer» SOLUTION :N/A

Discussion

43.	Solve: 2/3x+3/2x-3/4x=17/4
Answer» ANSWER :X = 3

Discussion

44.	A question paper has 20 questions, the answer to each of which is either true or false. A student scores 3 marks for every correct answer and loses 2 marks for every incorrect answer. If a student scores 25 marks, find the number of questions he answered correctly and the questions he answered incorrectly.
Answer» ANSWER :13 questions answered CORRECTLY ,7 answered INCORRECTLY

Discussion

45.	A parallelogram has :
Answer» no line of symmetry one line of symmetry the same number of LINES as the RHOMBUS FOUR lines of symmetry

Discussion

46.	Solve the following equations by trial - and - error method . 6p - 2 = 3p + 13
Answer» ANSWER :5

Discussion

47.	Find the perimeter and area of a rectangle having :Length = 8m , Breadth =9 dm
Answer» ANSWER :`178dm,720dm^(2)`

Discussion

48.	Find the area of DeltaABC in which angleB = 90^(@), BC = 8 cm and AC-10 cm. If BDbotAC, then find BD.
Answer» 4. 8 cm 8. 4 cm 3.7 cm none of these Answer :A

Discussion

49.	50 kg of an alloy of lead and tin contains 60% of lead. How muh lead must be melted into it to make the alloy cantain 75% of lead?
Answer» ANSWER :`30KG`

Discussion

50.	The sum of three consecutive odd number is 51. Find the numbers.
Answer» ANSWER :15, 17 and 19

Discussion

Explore topic-wise InterviewSolutions in Current Affairs.

Divide : 0.1575div0.21

If the cost of 6 1/4 m of cloth is Rs 1421 7/8then find thecostof 1 metre of cloth

Solve: 162.668 div 0.11

Divide 0.5124 by 12.

Sixteen men, working at 6 h a day, can do a piece of work in 15 days. In how many days can 18 men working at 10 h a day do the same work?

Fill in the blanks. 850 mL = "___________"L

Two trains are travelling in opposite direction at 72 km/h and 90 km/h. They cross each in 16s. If the length of the slower trains is 320 m, then find the length of the faster train (in m).

Solve : 5.763 div 1000

Write down the numerical as well as literal coefficient of each of the following monomials: -2p^(3)q^(2)

Find the product 7(1)/(4)xx2(3)/(16)xx2(2)/(7)

Is 10.342xx10^(7) the standard form of a large number ?

What fraction is Rs. 1750 of 2800?

Divide : 0.63 div10

Find the reciprocal of 3/313

The shoe sizes of 30 players selected for interschool competitions are given below : {:("Shoe size"(x_(i)),7,10,9,8,5,11,6),("Number of players"(f_(i)),4,5,8,3,5,2,3):} Find the median of this frequency distribution.

By actural division , express each of the following asa repeating decimal : 101/15

Naman has to serve 2 (3)/(4) litres of soft drink in cups of(1)/(8) litre. How many cups can he serve? Will there be any soft drink left over?

Write down the integers, if any, that do not have inverses under addition.

Which central tendency has been used to arrive at the following statements? Mickey noticed that half of the chocolate brands in the store cost more than 22.

320 g ="___________"kg

The meanof 9 numbers is 10. If one more number is added, the mean remains as 10. Find the number which is added.

Is there a triangle that does not have a rotational symmetry, but has a single line of symmetry ?

ABCD is a square with sides 12 cm each. Find its perimeter and area. Cut off a rectangle measuring C 8cm 2 cm by 4 cm from a corner as shown in the figure. Find the perimeter and area of the new polygon thus formed.

Divide : 0.125 div 25

Find: b. 7 xx (5)/(49)

345 mL= "____________"L

Choose the correct pair where the difference of the two integers is -15.

Solve the equationsand check your answer in the case: 6(3x+2)-5(6x-1)=3(x-8)-5(7x-6)=9x

Solve: 5.502 div 2.16

Write the following statements in the form of equations. The sum of five times a number and 3 is 38.

Find the sum. 0.04 57 + 0.0072

Evaluate : ((3)/(4))^(2)

Find the area of a rhombus having each side equal to 20 cm and one of its diagonals equal to 24 cm .

Solve: 0.4 x + 2.7 =2.9 x-3.55

Evaluate the following: (30 div 2) div 3

Solve the equationsand check your answer in the case: x-(2x-(3x-4)/(7))= (4x-27)/(3)-3

An equilateral triangle has three lines of symmetry, an isosceles triangle will have :

Evaluate: -799 div (-17)

Convert each of the following into a vulgar fraction : 0.bar6

Find the reciprocal of:(11)/(4)

What should be added to 7a-9b+13c to get 9a+b-c?

Solve: 2/3x+3/2x-3/4x=17/4

A parallelogram has :

Solve the following equations by trial - and - error method . 6p - 2 = 3p + 13

Find the perimeter and area of a rectangle having :Length = 8m , Breadth =9 dm

Find the area of DeltaABC in which angleB = 90^(@), BC = 8 cm and AC-10 cm. If BDbotAC, then find BD.

50 kg of an alloy of lead and tin contains 60% of lead. How muh lead must be melted into it to make the alloy cantain 75% of lead?

The sum of three consecutive odd number is 51. Find the numbers.