Maths Practice Question and Answer

Q: Smallest prime number greater than 200? 1768 0

  • 1
    201
    Correct
    Wrong
  • 2
    205
    Correct
    Wrong
  • 3
    211
    Correct
    Wrong
  • 4
    203
    Correct
    Wrong
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Answer : 3. "211"
Explanation :

Answer: C) 211 Explanation: From the trial and error method of division, 201 is divisible by 3 205 is divisible by 5 203 is divisible by 7   Hence, after eliminating three options, remained is 211 and is divisible by only 1 and itself.    Therefore, 211 is the smallest prime number greater than 200.

Q: Compounding interest means interest accrues 1537 1

  • 1
    at variable rates throughout the term
    Correct
    Wrong
  • 2
    more quickly than simple interest
    Correct
    Wrong
  • 3
    more slowly than simple interest
    Correct
    Wrong
  • 4
    at the same rate as simple interest
    Correct
    Wrong
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Answer : 2. "more quickly than simple interest"
Explanation :

Answer: B) more quickly than simple interest Explanation: Compounding interest means interest accrues on the interest charged and the principal amount each period the interest is charged. Compound interest is calculated by multiplying the principal amount by one plus the annual interest rate raised to the number of compound periods minus one.The total initial amount of the loan is then subtracted from the resulting value. The formula for calculating compound interest is: [P (1 + i)n] – P = P [(1 + i)n – 1] (Where P = Principal, i = nominal annual interest rate in percentage terms, and n = number of compounding periods.) Take a three-year loan of Rs. 10,000 at an interest rate of 5% that compounds annually. What would be the amount of interest? In this case, it would be: Rs. 10,000 [(1 + 0.05)3] – 1 = 10,000 [1.157625 – 1] = Rs. 1,576.25.   How it grows ::

Q: The ages of Sunitha and Pranitha are 40 years and 60 years, respectively. How many years before the ratio of their ages was 3 : 5? 1470 0

  • 1
    10 years
    Correct
    Wrong
  • 2
    15 years
    Correct
    Wrong
  • 3
    18 years
    Correct
    Wrong
  • 4
    24 years
    Correct
    Wrong
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Answer : 1. "10 years"
Explanation :

Answer: A) 10 years Explanation: Given the ages of Sunitha and Pranitha are 40 years and 60 years. Let before 'm' years, their ages be in the ratio of 3 : 5 ATQ, 40-m60-m = 35 => 200 - 5m = 180 - 3m =>2m = 20 => m = 10 years.

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Answer : 1. "48 kmph"
Explanation :

Answer: A) 48 kmph Explanation: Let the initial speed of Akhil be '4p' kmph Then speed after decrease in speed = '3p' kmph We know that,  Change in speed == Change in time According to the given data, 243p - 244p = 35 - 2560=> p = 12   Hence, the initial speed of Akhil = 4p = 4 x 12 = 48 kmph.

Q: Which of the following fraction is the largest? 1216 1

  • 1
    7/12
    Correct
    Wrong
  • 2
    9/16
    Correct
    Wrong
  • 3
    13/20
    Correct
    Wrong
  • 4
    32/80
    Correct
    Wrong
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Answer : 1. "7/12"
Explanation :

Answer: A) 7/12 Explanation: Here to say which fraction is greater from the given options, the fraction with greater numerator with same denominator or smaller denominator with same numerator. To find the greater fraction, among the given options, make the denominators same for the options by finding the LCM of all the denominators. 7/12, 9/16, 13/20, 32/80 Now, LCM of 12, 16, 20, 80 = 240. Then, 140/240, 135/240, 156/240, 96/240 Here  156240 > 140240 > 135240 > 96240=> 1320 > 712 > 916 > 3280   Hence, largest fraction = 13/20.

Q: The difference between 4632 and 20000 is what number 2858 0

  • 1
    15368
    Correct
    Wrong
  • 2
    12652
    Correct
    Wrong
  • 3
    14562
    Correct
    Wrong
  • 4
    14965
    Correct
    Wrong
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Answer : 1. "15368"
Explanation :

Answer: A) 15368 Explanation: The difference between 4632 and 20000 is given by subtracting smaler number from the bigger number. Here the bigger number is 20000 Smaller number is 4632 Now, subtracting 4632 from 20000 20000 - 4632 = 15368 and the resut is an even number.   Hence, The difference between 4632 and 20000 is 15368 and is an even number.

Q: How many window coverings are necessary to span 50 windows, if each window covering is 15 windows long? 2919 0

  • 1
    4
    Correct
    Wrong
  • 2
    15
    Correct
    Wrong
  • 3
    3
    Correct
    Wrong
  • 4
    50
    Correct
    Wrong
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Answer : 1. "4"
Explanation :

Answer: A) 4 Explanation: Given that,  Number of windows = 50 Each window covering covers 15 windows => 50 windows requires 50/15 window coverings = 50/15 = 3.333   Hence, more than 3 window coverings are required. In the options 4 is more than 3.    Hence, 4 window coverings are required to cover 50 windows of each covering covers 15 windows.

Q: A 200 m long train passes a motorcycler, running in the same direction at 12 km/hr, in 15 second and a jeep travelling in the same direction in 20 s. At what speed is the car travelling (length of both the motorcycler and jeep is negligible)? 2501 0

  • 1
    36 kmph
    Correct
    Wrong
  • 2
    32 kmph
    Correct
    Wrong
  • 3
    29 kmph
    Correct
    Wrong
  • 4
    24 kmph
    Correct
    Wrong
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Answer : 4. "24 kmph"
Explanation :

Answer: D) 24 kmph Explanation: Let the speed of the train be 'S' kmph From the given data, Distance = Length of train = D = 200 mts = 200 x 18/5 kms Time = 10 sec given speed of the motorcycler = 12 kmph Relative speed as they are moving in the same direction = (S - 12) kmph (S- 12) = 200 x 18515S - 12 = 48S = 60 kmph  Hence, the speed of the train = S = 60 kmph Now, Let the speed of the jeep be 'x' kmph 60 - x = 200 x 1852060 - x = 36x = 60 - 36x = 24 kmph   Therefore, the speed of the jeep = x = 24 kmph.

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