Odd man out and series

(26) Which number does not belong in the series: 5, 8, 14, 20, 26, 32, 38?

• (a) 20
• (b) 26
• (c) 32
• (d) 38

Answer

Correct Answer: (a) 20
The pattern is adding 3 to each number: 5, 8, 11, 14, 17, 20, 23, …
The number 20 does not fit this pattern.

(27) Look at this series: 2, 4, 9, 16, 25, 36, … What number should fill the blank?

• (a) 41
• (b) 49
• (c) 64
• (d) 49

Answer

Correct Answer: (d) 49
This is a series of perfect squares: 2^2, 2^2 + 1^2, 3^2, 4^2, 5^2, 6^2, \ldots
The next number should be \(7^2 = 49\).

(28) Which number does not belong in the series: 7, 17, 27, 37, 47, 57, 67?

• (a) 17
• (b) 27
• (c) 37
• (d) 57

Answer

Correct Answer: (d) 57
The pattern is adding 10 to each number: 7, 17, 27, 37, 47, 57, 67, …
The number 57 does not fit this pattern.

(29) Look at this series: 3, 9, 15, 21, 27, 33, … What number should fill the blank?

• (a) 35
• (b) 40
• (c) 36
• (d) 36

Answer

Correct Answer: (d) 36
The pattern is adding 6 to each number: 3, 9, 15, 21, 27, 33, 39, …
The next number should be \(33 + 6 = 39\).

(30) Which number does not belong in the series: 4, 8, 12, 16, 20, 24, 28?

• (a) 12
• (b) 16
• (c) 20
• (d) 24

Answer

Correct Answer: (d) 24
The pattern is adding 4 to each number: 4, 8, 12, 16, 20, 24, 28, …
The number 24 does not fit this pattern.