Number Puzzles Test Questions and Answers

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1.

What number replaces the question mark?

   A.) 10
   B.) 9
   C.) 11
   D.) 13

Answer: Option 'D'

Numbers follow the sequence of Prime Numbers.
2 + 6 + 8 + 10 + 3 = 29 
3 + 8 + 10 + 2 = 23 
4 + 10 + 5 = 19 
5 + 12 = 17 
Then after prime number is 13. Ans : 13

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2.

What number replaces the question mark?

   A.) 102
   B.) 121
   C.) 120
   D.) None of these

Answer: Option 'B'

As you move diagonally down, 
2 × 2 + 1 = 5 
5 × 2 + 2 = 12 
12 × 2 + 3 = 27 
27 × 2 + 4 = 58 
58 × 2 + 5 = 121, Then ans = 121.

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3.

What number replaces the question mark?

   A.) 11
   B.) 9
   C.) 7
   D.) 8

Answer: Option 'D'

The number at the centre of each triangle equals the sum of the lower two numbers minus the top number.
5 + 8 = 13 - 7 = 6 
9 + 3 = 12 - 8 = 4 
7 + 6 = 13 - 5 = 8. Answer = 8

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4.

What number replaces the question mark?

   A.) 4
   B.) 3
   C.) 2
   D.) 1

Answer: Option 'C'

The numbers in each colum of the diagram add up to 13.
7 + 1 + 3 + ? = 13 
2 + 6 + 4 + 1 = 13 
1 + 2 + 4 + 1 = 13 
1 + 2 + 5 + 5 = 13 
3 + 4 + 2 + 4 = 13

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5.

What number replaces the question mark?

   A.) 12
   B.) 11
   C.) 13
   D.) 7

Answer: Option 'B'

Numbers follow the alternate of Prime Numbers.
3 + 7 + 9 + 12 + 10 = 41 
4 + 6 + 10 + 9 = 31 
7 + 9 + 7 = 23 
5 + 12 = 17 
So next prime number is 11.

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6.

What number replaces the question mark?

   A.) 45
   B.) 55
   C.) 65
   D.) 70

Answer: Option 'C'

The sum of top number and bottum of left number is equal to the bottum of right number. 
1. 27 + 14 = 41 
2. 36 + 18 = 54 
3. 45 + 20 = 65, Then Answer : 65

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7.

What number replaces the question mark?

   A.) 14
   B.) 12
   C.) 15
   D.) 16

Answer: Option 'B'

7 × 4 = 28 
9 × 4 = 36 
3 × 4 = 12, Then answer = 12

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8.

What number replaces the question mark?

   A.) 3
   B.) 3.848
   C.) 3.464
   D.) 4.32

Answer: Option 'C'

82 = 64 ,  8 = 2.828
122 = 144,  12 = 3.464

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9.

What number replaces the question mark?

   A.) 1804
   B.) 1716
   C.) 1816
   D.) 1849

Answer: Option 'D'

362 = 1296
292 = 841
432 = 1849

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10.

What number replaces the question mark?

   A.) 60
   B.) 61
   C.) 62
   D.) 63

Answer: Option 'D'

As you work down the column, Numbers follow the sequence of square numbers from 16 to 81, Subtracting 3, then 6, then 9, etc....
42 = 16 - 3 = 13
52 = 25 - 6 = 19
62 = 36 - 9 = 27
72 = 49 - 12 = 37
82 = 64 - 15 = 49
92 = 81 - 18 = 63.

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