Number System Questions Practice Question and Answer

Q:

What is the sum of all three-digit numbers which are divisible by 20?

1242 0

  • 1
    19400
    Correct
    Wrong
  • 2
    20500
    Correct
    Wrong
  • 3
    24300
    Correct
    Wrong
  • 4
    21800
    Correct
    Wrong
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Answer : 3. "24300"

Q:

A number when divided by 296 gives a remainder 75. When the same number is divided by 37 the remainder will be: 

1242 0

  • 1
    8
    Correct
    Wrong
  • 2
    1
    Correct
    Wrong
  • 3
    2
    Correct
    Wrong
  • 4
    11
    Correct
    Wrong
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Answer : 2. "1 "
Explanation :

Let number (dividend) be X.

∴ X = 296 × Q + 75 where Q is the quotient and can have the values 1, 2, 3 etc.

= 37 × 8 × Q + 37 × 2 + 1

= 37 (8Q + 2) + 1

Thus we see that the remainder is 1.

[Remark : When the second divisor is a factor of the first divisor, the second remainder is obtained by dividing the first remainder by the second divisor.

Hence, divide 75 by 37, the remainder is 1].

Q:

The average of five consecutive number is 26, then the multiple of the first and the last number is

1241 0

  • 1
    722
    Correct
    Wrong
  • 2
    672
    Correct
    Wrong
  • 3
    648
    Correct
    Wrong
  • 4
    576
    Correct
    Wrong
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Answer : 2. "672"

Q:

Three numbers are such that if the average of any two of them is added to the third number, the sums obtained are 168, 174 and 180 respectively. What is the average of the original three numbers?

1240 0

  • 1
    84
    Correct
    Wrong
  • 2
    87
    Correct
    Wrong
  • 3
    89
    Correct
    Wrong
  • 4
    86
    Correct
    Wrong
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Answer : 2. "87"

Q:

The least number, which must be added to 6709 to make it exactly divisible by 9, is 

1236 0

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

Q:

Direction : What value should come in the place of question mark (?) in the following questions?

11283 + 25 % of ? + 727 = 13280 

1233 0

  • 1
    None of these
    Correct
    Wrong
  • 2
    5020
    Correct
    Wrong
  • 3
    5280
    Correct
    Wrong
  • 4
    15180
    Correct
    Wrong
  • 5
    5280
    Correct
    Wrong
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Answer : 1. "None of these "

Q:

When the integer n is divided by 7, the remainder is 3. What is the remainder if 5n divided by 7?

1233 0

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

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