Number Puzzles with Solution

1. Number Puzzle: Which number replaces the question mark?
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Answer: 11

Explanation:

The numbers in the right half from the series : 2, 3, 4, 5 The numbers in the left half from the series : 5, 7, 9, 11

2. Number Puzzle: Which number replaces the question mark?

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Answer: 70

Explanation:

7x2+2= 16; 16x2+2 = 34 and so on.

So missing number = 34x2+2 = 70

3. Number Puzzle: Which number replaces the question mark?

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Answer: 100

Explanation:

(7+5)^{2} = 144; (3+4)^{2} = 49; (5+1)^{2} = 36.

So, missing number = (2+8)^{2} = 100.

4. Number Puzzle: Which number replaces the question mark?

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Answer: 1

Explanation:

The two ends of each line segment contain a number and its square.

So answer is = 1^{2} = 1.

5. Number Puzzle: Which number replaces the question mark?

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Answer: 216

Explanation:

(5-4)^{3} = 1; (7-3)^{3} = 64; (11-8)^{3} = 27.

So the answer is = (8-2)^{3} = 6^{3} = 216.