COOP Test of Sequences 5 — Questions and Answers
Question 1: What is the next number? 4, 7, 11, 16, 22, ___
- 27
- 28
- 29 (Correct answer)
- 30
Correct answer: 29
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, ___
- DE
- EE (Correct answer)
- EF
- FF
Correct answer: EE
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
- 12
- 14
- 16 (Correct answer)
- 18
Correct answer: 16
Each term is doubled: 1, 2, 4, 8, 16, 32.
Question 4: What comes next? 0, 3, 8, 15, 24, ___
- 33
- 34
- 35 (Correct answer)
- 36
Correct answer: 35
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, ___
- M
- N
- O (Correct answer)
- P
Correct answer: O
Each letter advances 3 positions: C+3=F, F+3=I, I+3=L, L+3=O.
Question 6: What is the next number in the sequence? 120, 60, 30, 15, ___
- 5
- 7
- 7.5 (Correct answer)
- 10
Correct answer: 7.5
Each term is halved: 120÷2=60, 60÷2=30, 30÷2=15, 15÷2=7.5.
Question 7: Complete the pattern: 2, 3, 5, 7, 11, ___
- 12
- 13 (Correct answer)
- 14
- 15
Correct answer: 13
These are consecutive prime numbers: 2, 3, 5, 7, 11, 13.
COOP Test of Sequences 5
What is the next number? 4, 7, 11, 16, 22, ___