CogAT CogAT Quantitative Number Series 2

Question 1

What number comes next in the series: 2, 5, 8, 11, __?

Accepted Answer

14

Answer

Each number increases by 3, so after 11 comes 14.

Question 2

What number comes next in the series: 81, 27, 9, 3, __?

Accepted Answer

1

Answer

Each number is divided by 3, so 3 ÷ 3 = 1.

Question 3

What number comes next in the series: 7, 14, 21, 28, __?

Accepted Answer

35

Answer

These are multiples of 7, so after 28 (7×4) comes 35 (7×5).

Question 4

What number comes next in the series: 2, 3, 5, 7, 11, 13, __?

Accepted Answer

17

Answer

These are prime numbers in order, and the next prime after 13 is 17.

Question 5

What number comes next in the series: 50, 44, 38, 32, __?

Accepted Answer

26

Answer

Each number decreases by 6, so after 32 comes 26.

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