Crossover Aptitude Test Numerical Reasoning: Number Sequences 5

Question 1

What is the next term: 6, 11, 21, 41, 81, ?

Accepted Answer

161

Answer

Each term is roughly doubled minus 1: (81 × 2) − 1 = 161.

Question 2

Find the missing number: 1, 4, 13, 40, ?, 364

Accepted Answer

121

Answer

Each term is multiplied by 3 and then 1 is added: (40 × 3) + 1 = 121.

Question 3

Which number comes next: 2, 3, 5, 7, 11, 13, ?

Accepted Answer

17

Answer

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

Question 4

What is the missing value: 64, 32, ?, 8, 4

Accepted Answer

16

Answer

Each term is halved, so 32 ÷ 2 = 16.

Question 5

Find the next number: 3, 6, 11, 18, 27, ?

Accepted Answer

38

Answer

Differences are 3, 5, 7, 9, 11 (odd numbers increasing by 2), so 27 + 11 = 38.

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