Crossover Aptitude Test Numerical Reasoning: Number Sequences 2

Question 1

What is the next number in the sequence: 3, 6, 12, 24, 48, ?

Accepted Answer

96

Answer

Each term is doubled, so 48 × 2 = 96.

Question 2

Find the missing number: 100, 91, 82, 73, ?, 55

Accepted Answer

66

Answer

The sequence decreases by 9 each time, so 73 − 9 = 64... wait: 100-91=9, 91-82=9, 82-73=9, so 73-9=64. Answer is 64.

Question 3

What comes next: 2, 3, 5, 8, 13, 21, ?

Accepted Answer

34

Answer

This is the Fibonacci sequence; each term is the sum of the two preceding terms: 13 + 21 = 34.

Question 4

Which number completes the sequence: 1, 4, 9, 16, 25, ?

Accepted Answer

36

Answer

These are perfect squares (1², 2², 3², …), so the next is 6² = 36.

Question 5

Find the next term: 5, 10, 20, 40, 80, ?

Accepted Answer

160

Answer

Each term is multiplied by 2, so 80 × 2 = 160.

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