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Arithmetic MCQs

  • A person preparing for Olympics Games ran 9 km in 1 hour and 20 minutes, and then 12 km in 1 hour and 40 minutes. What is the average speed in km/hr?

    (A) 4 km/hr
    (B) 5 km/hr
    (C) 6 km/hr
    (D) 7 km/hr

    The answer is: (D) 7 km/hr
    Solution
    Total Distance = 9km + 12km = 21 km. And, Total Time = 1 hour 20 + 1 hour 40 = 3 hours. Hence, Average Speed is

  • What is the solution set of the equation: x2+4x+3=0

    Q. What is the solution set of the equation: x2+4x+3=0
    (A) {1, 3}
    (B) {–1, 3}
    (C) {1, –3}
    (D) {–1, –3}

    The answer is: (D) {–1, –3}
    Solution

  • The cost of an object is Rs 160. What will be the selling price to obtain a profit of 15%?

    (A) 180
    (B) 182
    (C) 184
    (D) 186

    The answer is: (C) 184
    Solution
    As, Cost + Profit = Selling Price. Therefore,

  • What is the rate of discount if a bicycle which price was Rs 4,000 and was sold for Rs 3,200?

    (A) 14%
    (B) 16%
    (C) 18%
    (D) 20%

    The answer is: (D) 20%
    Solution

  • The ratio of 50m and 4km is:

    (A) 1:20
    (B) 1:25
    (C) 1:40
    (D) 1:80

    The answer is: (D) 1:80
    Solution
    The ratio of 50m and 4km is: 50m/4km = 50m/4000m (1 kilometer = 1000 meters)
    Hence, ratio = 50/4000 = 1/80 = 1:80

  • The ratio of 20cm and 4m is:

    (A) 1 : 20
    (B) 1 : 25
    (C) 1 : 40
    (D) 1 : 80

    The answer is: (A) 1 : 20
    Solution
    The ratio of 20cm and 4m is: 20cm/4m = 20cm/400cm (1 meter = 100 centimeters)
    Hence, ratio = 20/400 = 1/20 = 1:20

  • If the radius of a circle is increased three times then its area is increased:

    (A) three time
    (B) six times
    (C) nine times
    (D) none of these

    The answer is: (C) nine times
    Area = πr2
    If radius is increased by 3 times, then
    NewArea = π(3r)2 = π9r2 =9(πr2) =9(Area)
    So, area is increased by 9 times.

  • 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