PI Abstract Pattern Series 5

Question 1

A series: 2, 5, 11, 23, 47, ___. What is next?

Accepted Answer

95

Answer

Each term is doubled and then 1 is added: 47 × 2 + 1 = 95.

Question 2

A figure set shows squares: the first has a side of 1, the second has a side of 2, doubling each time. What is the area of the 4th square?

Accepted Answer

16

Answer

The 4th square has side 8, so area = 8² = 64... but actually side doubles: 1,2,4,8; area = 8² = 64.

Question 3

A pattern alternates adding and subtracting: 10, 14, 11, 15, 12, 16, ___. What is next?

Accepted Answer

13

Answer

The pattern alternates +4, −3; so 16 − 3 = 13.

Question 4

A grid's diagonal from top-left to bottom-right contains: 1, 5, 13, 25, ___. What is next?

Accepted Answer

41

Answer

The differences are 4, 8, 12, 16; so 25 + 16 = 41.

Question 5

A symbol sequence uses ★, ●, ■ repeating in groups of three. What is the 20th symbol?

Accepted Answer

●

Answer

20 ÷ 3 = 6 remainder 2, so the 20th symbol is the 2nd in the cycle: ●.

PI - Cognitive Assessment Practice Test