1907 + Interview Questions in Maths in Class 7

1.	Simplify and write in exponential form : [(2^(3))^(2)xx3^(6)]-:5^(6)
Answer» ANSWER :`=((6)/(5))^(6)`

Discussion

2.	Evaluate: (-41) times 39
Answer» ANSWER :-1599

Discussion

3.	Find the mean proportion between : 18 and 8
Answer» ANSWER :12

Discussion

4.	Malti has deposited certain sum in a bank at 3.5% per annum. The bank announces an increase in the interest rate by 1.5% p.a. Malti deposits an additional ₹2500 in the bank. The annual interest that Malti receives now is ₹221, more than what she would have got earlier. Find the original deposite.
Answer» ANSWER :₹ 6400

Discussion

5.	Find the product : 0.04 xx0.36
Answer» ANSWER :0.0144

Discussion

6.	Find : b. 7 (5)/(6) + 4 (2)/(5) -6 (2)/(15)
Answer» ANSWER :`6 (1)/(10)`

Discussion

7.	Divide: b. 13 div (39)/(40)
Answer» ANSWER :`13 (1)/(3)`

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8.	Divide 3 11/15 div19 (3)/(5)
Answer» ANSWER :`4/21`

Discussion

9.	Find: c. (2)/(5) of Rs. 11
Answer» ANSWER :RS. 4 and 40 PAISE

Discussion

10.	In -5p^(2)q^(3)r^(4), write down the coefficient of : pqr
Answer» SOLUTION :N/A

Discussion

11.	Evaluate: d. (14)/( 25) xx (20)/( 49)
Answer» ANSWER :`(8)/(35)`

Discussion

12.	Two pipes P_(1) " and " P_(2) can filla tank in 6 h and 3 h, respectively. Both the pipes are opened simultaneously and pipe P_(1) is closed after 1 h.. Find the time taken by P_(2) to fill the remaining par of the tank (in hours).
Answer» 1 `1(1)/(2)` 2 `2(1)/(2)` SOLUTION :Pipe `P_(1) " can fill " (1)/(6)` of the tank in 1 h. Pipe `P_(2) " can fill " (1)/(3)` of the tank in 1 h. Pipe `P_(1) " and " P_(2) " together can fill " ((1)/(6) + (1)/(3))` of thetank in 1 h. The part of the tank to be filled = `1-((1)/(6) + (1)/(3))` ` = 1-((1+2)/(6)) = (6-3)/(6) = (3)/(6) = (1)/(2)` Time taken by the pipe `P_(2) " to fill " (1)/(2)` of tank at the `"rate of " (1)/(3) " per hour "=(((1)/(2)))/(((1)/(3))) = (1)/(2) xx (3)/(1) = 1(1)/(2)`h. HENCE, the correct option is (b).

Discussion

13.	Identify which of the following expressions are polynomials. If so, write their degrees. 9x^(2)y^(2)-3xy^(2)+5x^(2)y-6x
Answer» SOLUTION :N/A

Discussion

14.	Evaluate: 2 div (2)/(3)
Answer» `3` `5` `7` `6` ANSWER :A

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15.	Solve the equationsand check your answer in the case: (8-3x)/(5x+31)=(2)/(3)
Answer» ANSWER :X = -2

Discussion

16.	SimplifyQ4/7-:9/14(ii)7/10-:3/5(iii)8/9-:16(iv)9-:1/3(v)24-:6/7 (vi)3 3/5-:4/5 (vii)3 3/7-:8/21 (viii)5 4/7-:1 3/10 (ix)15 3/7-:1 23/49
Answer» ANSWER :`8/9`, `1 1/6`, `1/18` , 27, 28, `4 1/2`, 9, `4 2/7`, `10 1/2`

Discussion

17.	Round off : 9.638 , correct to 2 decimal places
Answer» ANSWER :9.64

Discussion

18.	Fill in the blanks and state the property used. 15+(-45)= "_______" +15
Answer» ANSWER :`-45`; COMMUTATIVE PROPERTY

Discussion

19.	Divide 3/14 div11/42
Answer» ANSWER :`9/11`

Discussion

20.	At what rate per cent per annum will ₹700 produce ₹168 as simple interest in 2 years ?
Answer» ANSWER :`R=12%`

Discussion

21.	Four-fifths of a number is greater than three-fourthsof the number by 4. Find the number.
Answer» ANSWER :80

Discussion

22.	State true or false in each of the following statements. (96 div 4) div 2 ne 96 div (4 div 2)
Answer» ANSWER :1

Discussion

23.	Find the product. 170.170 xx 100
Answer» ANSWER :`1717`

Discussion

24.	A boy bought 8 pencils for Rs 46.80 . What is the cost of each pencil ?
Answer» ANSWER :RS 5.85

Discussion

25.	Multiply : 6.25xx1000
Answer» ANSWER :6250

Discussion

26.	Divide 1.9224 by 0.54.
Answer» ANSWER :3.56

Discussion

27.	A cable o f length 257 1/4 m has to be cut into 21 pieces o f equal length. Fin d the length o f each piece.
Answer» ANSWER :`12 (1)/(4)`

Discussion

28.	The radius of the circular pipe is 13 cm. What length of a tape is required to warp around the pipe once ?
Answer» ANSWER :`81.64 CM`

Discussion

29.	Alka's age is 5 years more than 4 times the age of Suman. If Alka's age is 45 years, find Suman's age.
Answer» ANSWER :SUMAN's AGE 16 YEARS

Discussion

30.	Evaluate: 985.92 div 8
Answer» ANSWER :`123.24`

Discussion

31.	Add : 63.05 , 24.839 , 3.7 , 16.85
Answer» ANSWER :108.439

Discussion

32.	Find the reciprocal of 1 1/2
Answer» ANSWER :`2/3`

Discussion

33.	The value of 3 (x^2-3x+2) when x=2 is 0.
Answer» SOLUTION :NA

Discussion

34.	Evaluate: 202 . 022 xx 1000
Answer» ANSWER :`202022`

Discussion

35.	Solve : 14.78 - 3.6 [2.5 - (1.4 - 0.9)]
Answer» ANSWER :`7.2 = 7.58`

Discussion

36.	Find the product 7/18xx9/14
Answer» ANSWER :`1/4`

Discussion

37.	Express each of the following ratios in simplest form : 6 (2)/(3) hours : 1 day
Answer» ANSWER :`5 : 18`

Discussion

38.	Check whether the following numbers are in proportionor not : (1)/(2),(1)/(5),(1)/(6),(1)/(15)
Answer» ANSWER :YES

Discussion

39.	Evaluate the following using properties for multiplication to simplify the multiplication. 33 times 12
Answer» ANSWER :396

Discussion

40.	Kiran is five times as old as her niece Poonam. After five years, Kiran will be thrice as old as Poonam. Find their present ages
Answer» ANSWER :5 YEARS , 25 years

Discussion

41.	Write the following in exponential form and identify the base and the exponent. a. 32 b. 243 c. 625 d. -125
Answer» Answer :a. `5` b. `5` C. `4` d. `3`

Discussion

42.	Evaluate: f. 12 (1)/(2) -3 (9)/(14) + 4 (5)/(7)
Answer» ANSWER :`13 (4)/(7)`

Discussion

43.	Find the length of the diagonal of a rectangle whose sides are 21 cm and 20 cm.
Answer» ANSWER :29 CM

Discussion

44.	(-15)xx 8 + (-5)xx2 = ?
Answer» `150` `-150` `90` `-90` ANSWER :B

Discussion

45.	Evaluate: 299.99 div 14
Answer» ANSWER :`21.42`

Discussion

46.	Solve the following equations and verify the results. 5x -2 = 3x - 4
Answer» ANSWER :X = - 1

Discussion

47.	Multiply th 23.67 xx 1000
Answer» ANSWER :`23670`

Discussion

48.	Evaluate: -3/8 + 5/8 + 7/8, (ii) 11/3 + -5/3 + -2/3, (iii) -1+ 2/(-3) + 5/6, (iv) 7/26 + (-11)/13 + 2, (v) 3+(-7/8) + -3/4, (vi) -13/8 + 7/16 + (-3)/4
Answer» Answer :(i) `9/8`, (ii) `4/3`, (III) `-5/6`, (IV) `37/26`, (V) `11/8`, (vi) `-31/16`

Discussion

49.	Find the median of the data: 17,16,12,14,14,16,17,22,15,17,16,18
Answer» ANSWER :16

Discussion

50.	A pipe can fill an empty tank in 5 h and there is an emptying pipe which can empty the full tank in 7 h. If both the pipes are kept open simultaneously, then in how many hours will the tank be filled?
Answer» ANSWER :17.5 H

Discussion

Explore topic-wise InterviewSolutions in Current Affairs.

Simplify and write in exponential form : [(2^(3))^(2)xx3^(6)]-:5^(6)

Evaluate: (-41) times 39

Find the mean proportion between : 18 and 8

Find the product : 0.04 xx0.36

Find : b. 7 (5)/(6) + 4 (2)/(5) -6 (2)/(15)

Divide: b. 13 div (39)/(40)

Divide 3 11/15 div19 (3)/(5)

Find: c. (2)/(5) of Rs. 11

In -5p^(2)q^(3)r^(4), write down the coefficient of : pqr

Evaluate: d. (14)/( 25) xx (20)/( 49)

Two pipes P_(1) " and " P_(2) can filla tank in 6 h and 3 h, respectively. Both the pipes are opened simultaneously and pipe P_(1) is closed after 1 h.. Find the time taken by P_(2) to fill the remaining par of the tank (in hours).

Identify which of the following expressions are polynomials. If so, write their degrees. 9x^(2)y^(2)-3xy^(2)+5x^(2)y-6x

Evaluate: 2 div (2)/(3)

Solve the equationsand check your answer in the case: (8-3x)/(5x+31)=(2)/(3)

SimplifyQ4/7-:9/14(ii)7/10-:3/5(iii)8/9-:16(iv)9-:1/3(v)24-:6/7 (vi)3 3/5-:4/5 (vii)3 3/7-:8/21 (viii)5 4/7-:1 3/10 (ix)15 3/7-:1 23/49

Round off : 9.638 , correct to 2 decimal places

Fill in the blanks and state the property used. 15+(-45)= "_______" +15

Divide 3/14 div11/42

At what rate per cent per annum will ₹700 produce ₹168 as simple interest in 2 years ?

Four-fifths of a number is greater than three-fourthsof the number by 4. Find the number.

State true or false in each of the following statements. (96 div 4) div 2 ne 96 div (4 div 2)

Find the product. 170.170 xx 100

A boy bought 8 pencils for Rs 46.80 . What is the cost of each pencil ?

Multiply : 6.25xx1000

Divide 1.9224 by 0.54.

A cable o f length 257 1/4 m has to be cut into 21 pieces o f equal length. Fin d the length o f each piece.

The radius of the circular pipe is 13 cm. What length of a tape is required to warp around the pipe once ?

Alka's age is 5 years more than 4 times the age of Suman. If Alka's age is 45 years, find Suman's age.

Evaluate: 985.92 div 8

Add : 63.05 , 24.839 , 3.7 , 16.85

Find the reciprocal of 1 1/2

The value of 3 (x^2-3x+2) when x=2 is 0.

Evaluate: 202 . 022 xx 1000

Solve : 14.78 - 3.6 [2.5 - (1.4 - 0.9)]

Find the product 7/18xx9/14

Express each of the following ratios in simplest form : 6 (2)/(3) hours : 1 day

Check whether the following numbers are in proportionor not : (1)/(2),(1)/(5),(1)/(6),(1)/(15)

Evaluate the following using properties for multiplication to simplify the multiplication. 33 times 12

Kiran is five times as old as her niece Poonam. After five years, Kiran will be thrice as old as Poonam. Find their present ages

Write the following in exponential form and identify the base and the exponent. a. 32 b. 243 c. 625 d. -125

Evaluate: f. 12 (1)/(2) -3 (9)/(14) + 4 (5)/(7)

Find the length of the diagonal of a rectangle whose sides are 21 cm and 20 cm.

(-15)xx 8 + (-5)xx2 = ?

Evaluate: 299.99 div 14

Solve the following equations and verify the results. 5x -2 = 3x - 4

Multiply th 23.67 xx 1000

Evaluate: -3/8 + 5/8 + 7/8, (ii) 11/3 + -5/3 + -2/3, (iii) -1+ 2/(-3) + 5/6, (iv) 7/26 + (-11)/13 + 2, (v) 3+(-7/8) + -3/4, (vi) -13/8 + 7/16 + (-3)/4

Find the median of the data: 17,16,12,14,14,16,17,22,15,17,16,18

A pipe can fill an empty tank in 5 h and there is an emptying pipe which can empty the full tank in 7 h. If both the pipes are kept open simultaneously, then in how many hours will the tank be filled?