Ncert Class 8 – Maths -WorkSheet- Questions – Exercise SET F

Single Correct Type Questions

  1. Find value of x : If 1/5 : 2/3 : 3/7 : x
    (A)8/7
    (B)7/3
    (C)10/7
    (D)6/7
  2. The ratio of 60 cm : 1.8 m is
    (A) 100 : 3 (B) 3 : 100
    (C) 1 : 3 (D) 3 : 1
  3. An office opens at 8:00 am and closes at 6:00 pm
    with a lunch break of 45 minute. The ratio of lunch
    break to the total period in the office is
    (A) 2 : 45 (B) 3 : 40
    (C) 2: 9 (D) 9 : 2
  4. A car requires 5 litres of petrol to cover 80 km.
    How many litres of petrol are required to cover 32
    km?
    (A) 1 (B) 2
    (C) 3 (D) 4
  5. The mean proportional between 48 and 75 is
    (A) 50 (B) 60
    (C) 70 (D) 75

Multi Correct Type Questions

  1. Two numbers are in the ratio 4 : 5. If 10 is subtracted from the first number and 9 is subtracted from the second, the ratio becomes 2 : 3 then the numbers are
    (A) 24 (B) 30
    (C) 25 (D) 26
  2. Divide the 612 into three parts such that the first part is 3/4 of the second part and the ratio between second and third part is 5 : 4. Then the numbers are
    (A) 180 (B) 240
    (C) 192 (D) 150
  3. Which of the following ratio is in the lowest form.
    (A) 21 : 56 (B) 9 : 19
    (C) 13 : 31 (D) 23 : 40
  4. Which of the following is false.
    (A) 15 : 40 : : 10 : 30 (B) 16 : 48 : : 25 : 75
    (C) 40 : 60 : : 30 : 40 (D) 20 : 100 : : 30 : 120
  5. If the numbers 9, 24, x are in continued proportion then x is _.
    (A) 64 (B) 42
    (C) 30 (D) 3

Case Based Questions:


X, Y and Z together completed a work and earned Rs.86,000. But X worked for 3 days, Y for 4 days and Z for 5 days. If their daily wages are in the ratio 6 : 7 : 8.

  1. The value of X =
  2. The value of Y =
  3. The value of Z =

Assertion & Reason Type Questions


(A) Both Assertion (A) and Reason (R) are true
and Reason (R) is the correct explanation of
Assertion (A).
(B) Both Assertion (A) and Reason (R) are true
but reason (R) is not the correct explanation
of Assertion (A).
(C) Assertion (A) is true but Reason (R) is false.
(D) Assertion (A) is false but Reason (R) is true.
Weekly Home Assignment – 31_[CLASS – 08]

1.Assertion: The third proportional to the numbers 2.5 and 1.5 is 0.9.
Reason: If a : b : : b : x then x is called third proportional of a and b.

2Assertion: The mean proportional between 48 and 12 is 24.
Reason: If a : x : : x : 6, x is called mean proportional of a, b.

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