WordExchange

Arithmetic MCQs

  • What are total number of combinations of 9 things taken 3 at a time?

    (A) 18
    (B) 27
    (C) 48
    (D) 84

    The answer is: (D) 84
    Combinations = [9!]/[3!(9-3)!] = [9.8.7.6!]/[3!.6!] = 504/6 = 84

  • 16, 24, _____ , 40, 48

    Choose the answer which best completes the number pattern:
    16, 24, _____, 40, 48
    (A) 30
    (B) 32
    (C) 34
    (D) 36

    The answer is: (B) 32
    8×2=16, 8×3=24, 8×4=32, 8×5=40

  • The 40% of 60 is what number?

    (A) 12
    (B) 24
    (C) 16
    (D) None of these

    The answer is: (B) 24
    40% of 60 = (40/100)×60=24

  • If 20% of a number is 40. Then 70% of the number is?

    (A) 110
    (B) 120
    (C) 130
    (D) 140

    The answer is: (D) 140
    SOLUTION
    Let x be the number whose 20% is 40. Then,

  • What is the number whose 90% is 90?

    (A) 10
    (B) 90
    (C) 100
    (D) 180

    The answer is: (C) 100
    It is obvious to note that 90% of 100 is 90.

  • What is the average of the numbers: 0, 2, 5, 6, 7 and 10?

    (A) 4
    (B) 5
    (C) 6
    (D) 7

    The answer is: (B) 5
    SOLUTION
    (0+2+5+6+7+10)/6 = 30/6 = 5