Crossover Aptitude Test Numerical Reasoning: Number Sequences 4

Question 1

What is the next number: 1, 3, 7, 15, 31, ?

Accepted Answer

63

Answer

Each term is doubled and 1 is added: (31 × 2) + 1 = 63.

Question 2

Find the missing value: 81, 27, 9, ?, 1

Accepted Answer

3

Answer

Each term is divided by 3, so 9 ÷ 3 = 3.

Question 3

Which number completes the sequence: 5, 11, 17, 23, ?, 35

Accepted Answer

29

Answer

The sequence increases by 6 each time, so 23 + 6 = 29.

Question 4

What comes next: 0, 1, 3, 6, 10, 15, ?

Accepted Answer

21

Answer

These are triangular numbers; differences increase by 1 each time (1,2,3,4,5,6), so 15 + 6 = 21.

Question 5

Find the next term: 1000, 500, 250, 125, ?

Accepted Answer

62.5

Answer

Each term is halved, so 125 ÷ 2 = 62.5.

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