Number System Questions Practice Question and Answer

Q:

What is the smallest digit that must be added to the product 5786 × 5784 to make it a perfect square?

1268 0

  • 1
    1
    Correct
    Wrong
  • 2
    6
    Correct
    Wrong
  • 3
    5
    Correct
    Wrong
  • 4
    4
    Correct
    Wrong
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Answer : 3. "5"

Q:

A number when divided by 6 leaves remainder 3. When the square of the same number is divided by 6, the remainder is : 

1264 0

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

The remainder will be same.

On dividing 9 by 6, remainder = 3

On dividing 81 by 6, remainder = 3

Q:

For what value of ‘y’, $$ {x^{2}+{1\over12}{x}+y^{2}}$$ is perfect square?

1264 0

  • 1
    1/3
    Correct
    Wrong
  • 2
    1/12
    Correct
    Wrong
  • 3
    1/24
    Correct
    Wrong
  • 4
    1/6
    Correct
    Wrong
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Answer : 3. "1/24"

Q:

What should be the least added to 41116 so that the sum is divisible by 8?

1257 0

  • 1
    5
    Correct
    Wrong
  • 2
    8
    Correct
    Wrong
  • 3
    4
    Correct
    Wrong
  • 4
    12
    Correct
    Wrong
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Answer : 3. "4"

Q:

When 1062, 1134 and 1182 are divided by the greatest number .x, the remainder in each case is y. What is the value of (x − y)?

1255 0

  • 1
    17
    Correct
    Wrong
  • 2
    18
    Correct
    Wrong
  • 3
    16
    Correct
    Wrong
  • 4
    19
    Correct
    Wrong
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Answer : 2. "18"
Explanation :

The value of (x-y) will be 18

Q:

In a question on division, the divisor is 7 times the quotient and 3 times the remainder. If the remainder is 28, then the dividend is 

1251 0

  • 1
    588
    Correct
    Wrong
  • 2
    784
    Correct
    Wrong
  • 3
    823
    Correct
    Wrong
  • 4
    1036
    Correct
    Wrong
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Answer : 4. "1036"
Explanation :

Let the quotient be Q and the remainder be R. Then

Divisor = 7 Q = 3 R

∴ Divisor = 7 Q = 7 × 12 = 84

Dividend = Divisor × Quotient + Remainder = 84 × 12 + 28 = 1008 + 28 = 1036

Q:

The least number that should be added to 35460 so that the sum is exactly divisible by 3, 4, 5 and 7 is:

1250 0

  • 1
    180
    Correct
    Wrong
  • 2
    420
    Correct
    Wrong
  • 3
    240
    Correct
    Wrong
  • 4
    84
    Correct
    Wrong
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Answer : 3. "240 "

Q:

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

$$ 4{7\over 8}$$ - $$ 2{1\over 2}$$+$$ 1{3\over 4}$$=?

1248 0

  • 1
    $$ 4{5\over 8}$$
    Correct
    Wrong
  • 2
    $$ 3{7\over 8}$$
    Correct
    Wrong
  • 3
    $$ 8{1\over 4}$$
    Correct
    Wrong
  • 4
    $$ 3{1\over 4}$$
    Correct
    Wrong
  • 5
    None of these
    Correct
    Wrong
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Answer : 5. "None of these"

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