Number System Questions Practice Question and Answer

Q:

The sum of square of two numbers is 68 and square of the difference of them is 36. Then multiplication value of the two is. 

2864 0

  • 1
    16
    Correct
    Wrong
  • 2
    32
    Correct
    Wrong
  • 3
    58
    Correct
    Wrong
  • 4
    30
    Correct
    Wrong
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Answer : 1. "16 "

Q:

A number when divided successively by 4 and 5 leaves the remainder 1 and 4 respectively. When it is successively divided by 5 and 4 the respective remainders will be: 

2844 0

  • 1
    4, 1
    Correct
    Wrong
  • 2
    3, 2
    Correct
    Wrong
  • 3
    2, 3
    Correct
    Wrong
  • 4
    1, 2
    Correct
    Wrong
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Answer : 3. "2, 3 "

Q:

A boy added all natural numbers from 1 to 10, however, he added one number twice due to which the sum becomes 58. What is the number which he added twice? 

2816 0

  • 1
    4
    Correct
    Wrong
  • 2
    7
    Correct
    Wrong
  • 3
    3
    Correct
    Wrong
  • 4
    8
    Correct
    Wrong
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Answer : 3. "3"

Q:

Which is the smallest prime number? 

2686 0

  • 1
    0
    Correct
    Wrong
  • 2
    1
    Correct
    Wrong
  • 3
    2
    Correct
    Wrong
  • 4
    3
    Correct
    Wrong
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Answer : 3. "2 "

Q: Smallest prime number greater than 200? 2645 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:

What approximate value will come in place of the question mark (?) in the following questions?

175 x 28 + 275 x 27.98 =? 

2592 0

  • 1
    11800
    Correct
    Wrong
  • 2
    12600
    Correct
    Wrong
  • 3
    12800
    Correct
    Wrong
  • 4
    11600
    Correct
    Wrong
  • 5
    12200
    Correct
    Wrong
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Answer : 2. "12600 "

Q:

If $$ x=(164)^{169}+ (333)^{337}-(727)^{726}$$ then what is the units digit of x?

2559 1

  • 1
    5
    Correct
    Wrong
  • 2
    9
    Correct
    Wrong
  • 3
    7
    Correct
    Wrong
  • 4
    8
    Correct
    Wrong
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Answer : 4. "8"

Q:

A certain number when divided by 175 leaves a remainder 132. When the same number is divided by 25, the remainder is:

2549 0

  • 1
    6
    Correct
    Wrong
  • 2
    7
    Correct
    Wrong
  • 3
    8
    Correct
    Wrong
  • 4
    9
    Correct
    Wrong
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Answer : 2. "7"

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