COOP Test of Sequences 5

Question 1

What is the next number? 4, 7, 11, 16, 22, ___

Accepted Answer

29

Answer

The differences increase by 1 each time: +3, +4, +5, +6, +7; so 22+7=29.

Question 2

Which comes next? AA, BB, CC, DD, ___

Accepted Answer

EE

Answer

Each term repeats the next letter of the alphabet twice: AA, BB, CC, DD, EE.

Question 3

Find the missing number: 1, 2, 4, 8, ___, 32

Accepted Answer

16

Answer

Each term is doubled: 1, 2, 4, 8, 16, 32.

Question 4

What comes next? 0, 3, 8, 15, 24, ___

Accepted Answer

35

Answer

Each term equals n²−1 where n starts at 1: 1−1=0, 4−1=3, 9−1=8, 16−1=15, 25−1=24, 36−1=35.

Question 5

Which letter is next? C, F, I, L, ___

Accepted Answer

O

Answer

Each letter advances 3 positions: C+3=F, F+3=I, I+3=L, L+3=O.

COOP Exam Practice Test