Number System Questions Practice Question and Answer

Q:

The smallest positive integer, which when multiplied by 392 gives the product a perfect square number, will be :

1292 0

  • 1
    5
    Correct
    Wrong
  • 2
    6
    Correct
    Wrong
  • 3
    7
    Correct
    Wrong
  • 4
    None
    Correct
    Wrong
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Answer : 4. "None "

Q:

The total number of digits used in numbering the pages of a book of 366 pages is

1292 0

  • 1
    732
    Correct
    Wrong
  • 2
    990
    Correct
    Wrong
  • 3
    1098
    Correct
    Wrong
  • 4
    1305
    Correct
    Wrong
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Answer : 2. "990"

Q:

There are two numbers such that the first number is four times of the second mumber. If their average is 65, then what is the second number?

1290 0

  • 1
    26
    Correct
    Wrong
  • 2
    14
    Correct
    Wrong
  • 3
    24
    Correct
    Wrong
  • 4
    28
    Correct
    Wrong
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Answer : 1. "26"

Q:

Directions: Find the wrong number in the following number series:

2, 3, 8, 31, 154, 924, 6460

1284 0

  • 1
    924
    Correct
    Wrong
  • 2
    6460
    Correct
    Wrong
  • 3
    154
    Correct
    Wrong
  • 4
    8
    Correct
    Wrong
  • 5
    31
    Correct
    Wrong
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Answer : 1. "924"

Q:

Two positive numbers differ by 1280. When the greater number is divided by the smaller number, the quotient is 7 and the remainder is 50. The greater number is:

1282 0

  • 1
    1558
    Correct
    Wrong
  • 2
    1458
    Correct
    Wrong
  • 3
    1585
    Correct
    Wrong
  • 4
    1485
    Correct
    Wrong
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Answer : 4. "1485"
Explanation :

Given :- Two positive numbers differ by 1280 

When the greater number is divided by the smaller number The quotient is 7 and the remainder is 50 

Concept :- Dividend = Quotient × divisor + remainder 

Calculation :- Let greater number = a and Smaller number = b From question, ⇒ a - b = 1280 ....(1) Again from question, ⇒ a = 7b + 50 ....(2) 

Put the value of a from equation (2) into equation (1) ⇒ 7b + 50 - b = 1280 ⇒ 6b = 1280 - 50 ⇒ 6b = 1230 ⇒ b = (1230/6) ⇒ b = 205 

Put the value of b in equation (1) ⇒ a - 205 = 1280 ⇒ a = 1280 + 205 ⇒ a = 1485 ⇒ Greater number = 1485 ∴ Greater number is 1485

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Answer : 1. "12"

Q:

Adding 335 to 5A7 results in 8B2. The number 8B2 is divisible by 3. Accordingly, what will be the maximum possible value of A?

1277 0

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

Q:

Find the mode for the given distribution (rounded off to two decimal places)

Class                             5-10 10-15 15-20 20-25 25-30 30-35

Interval Frequency       8         7          6         9          11      10

1273 0

  • 1
    35.25
    Correct
    Wrong
  • 2
    40.25
    Correct
    Wrong
  • 3
    30.33
    Correct
    Wrong
  • 4
    28.33
    Correct
    Wrong
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Answer : 4. "28.33"

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