CCAT Number Series Patterns 5 — Questions and Answers
Question 1: What comes next? 17, 14, 11, 8, 5, ___
- 3
- 2 (Correct answer)
- 1
- 0
Correct answer: 2
Each term decreases by 3, so 5 − 3 = 2.
Question 2: What comes next? 1, 2, 6, 24, 120, ___
- 240
- 600
- 720 (Correct answer)
- 840
Correct answer: 720
These are factorials: 1!, 2!, 3!, 4!, 5!, so next is 6! = 720.
Question 3: What comes next? 3, 7, 15, 31, 63, ___
- 95
- 127 (Correct answer)
- 125
- 121
Correct answer: 127
Each term is doubled then 1 is added: 63 × 2 + 1 = 127.
Question 4: What comes next? 50, 48, 44, 38, 30, ___
- 22
- 18
- 20 (Correct answer)
- 24
Correct answer: 20
Differences increase by 2 each step: −2, −4, −6, −8, −10, so 30 − 10 = 20.
Question 5: What comes next? 6, 12, 10, 20, 18, 36, 34, ___
- 32
- 68 (Correct answer)
- 70
- 64
Correct answer: 68
The pattern alternates: ×2, −2, ×2, −2…, so 34 × 2 = 68.
Question 6: What comes next? 2, 5, 11, 23, 47, ___
- 94
- 95 (Correct answer)
- 96
- 97
Correct answer: 95
Each term is doubled then 1 is added: 47 × 2 + 1 = 95.
Question 7: What comes next? 81, 64, 49, 36, 25, ___
- 18
- 16 (Correct answer)
- 14
- 12
Correct answer: 16
These are perfect squares in descending order: 9², 8², 7², 6², 5², so next is 4² = 16.
CCAT Number Series Patterns 5
What comes next? 17, 14, 11, 8, 5, ___