PI Number Series Problems 2

Question 1

What comes next in the series: 3, 6, 12, 24, 48, ___?

Accepted Answer

96

Answer

Each term is multiplied by 2, so 48 × 2 = 96.

Question 2

Find the missing number: 81, 27, 9, 3, ___

Accepted Answer

1

Answer

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

Question 3

What is the next term: 2, 5, 10, 17, 26, ___?

Accepted Answer

37

Answer

The differences are 3, 5, 7, 9, 11 — odd numbers increasing by 2, so 26 + 11 = 37.

Question 4

Complete the series: 1, 1, 2, 3, 5, 8, ___

Accepted Answer

13

Answer

Each term equals the sum of the two preceding terms (Fibonacci), so 5 + 8 = 13.

Question 5

What comes next: 100, 90, 81, 73, 66, ___?

Accepted Answer

60

Answer

The differences are 10, 9, 8, 7, 6 — decreasing by 1 each time, so 66 − 6 = 60.

PI - Cognitive Assessment Practice Test