Number System Questions Practice Question and Answer

Q:

In a class, 3/5 of the students are girls and rest are boys. If 2/9 of the girls and 1/4 of the boys are absent. What part of the total number of students are present?

22421 4

  • 1
    23/30
    Correct
    Wrong
  • 2
    23/36
    Correct
    Wrong
  • 3
    18/49
    Correct
    Wrong
  • 4
    17/25
    Correct
    Wrong
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Answer : 1. "23/30"

Q:

64329 is divided by a certain number, 175, 114 and 213 appear as three successive remainders. The devisor is

1751 0

  • 1
    184
    Correct
    Wrong
  • 2
    224
    Correct
    Wrong
  • 3
    234
    Correct
    Wrong
  • 4
    296
    Correct
    Wrong
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Answer : 3. "234"
Explanation :

Number at (i) = 643 – 175 = 468

Number at (ii) = 1752 – 114 = 1638

Number at (iii) = 1149 – 213 = 936

Clearly, 468, 1638 and 936 are multiples of 234 and 234 > 213.

Divisor = 234

Q: Smallest prime number greater than 200? 1788 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:

$$(49)^{15}-1$$ is exactly divisible by :

17618 5

  • 1
    50
    Correct
    Wrong
  • 2
    51
    Correct
    Wrong
  • 3
    29
    Correct
    Wrong
  • 4
    8
    Correct
    Wrong
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Answer : 4. "8"

Q: The difference between 4632 and 20000 is what number 2883 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:

if 3 times a number exceeds its 3/5 by 60, then the number is.

4013 0

  • 1
    25
    Correct
    Wrong
  • 2
    35
    Correct
    Wrong
  • 3
    45
    Correct
    Wrong
  • 4
    60
    Correct
    Wrong
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Answer : 1. "25"

Q:

A person gives 1/4  of his property to his daughter, 1/2  to his sons and 1/5 for charity. How much has he given away?

6697 1

  • 1
    1/20
    Correct
    Wrong
  • 2
    19/20
    Correct
    Wrong
  • 3
    1/10
    Correct
    Wrong
  • 4
    9/10
    Correct
    Wrong
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Answer : 2. "19/20"

Q:

If $${17}^{200}$$ is divided by 18, the remainder is:

1774 0

  • 1
    17
    Correct
    Wrong
  • 2
    16
    Correct
    Wrong
  • 3
    1
    Correct
    Wrong
  • 4
    2
    Correct
    Wrong
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Answer : 3. "1"

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