CAT4 Number Series 3 — Questions and Answers
Question 1: What number comes next? 1, 1, 2, 3, 5, ?
- 7
- 8 (Correct answer)
- 9
- 6
Correct answer: 8
Each term is the sum of the two before it, so 3 + 5 = 8.
Question 2: What number is missing? 12, ?, 24, 30, 36
- 16
- 18 (Correct answer)
- 20
- 22
Correct answer: 18
The series increases by 6, so 12 + 6 = 18.
Question 3: What number comes next? 50, 45, 40, 35, ?
- 25
- 28
- 30 (Correct answer)
- 32
Correct answer: 30
Each term drops by 5, so 35 - 5 = 30.
Question 4: What number comes next? 4, 8, 16, 32, ?
- 48
- 64 (Correct answer)
- 56
- 40
Correct answer: 64
Each term doubles, so 32 x 2 = 64.
Question 5: What number is missing? 2, 6, 12, 20, ?
- 28
- 30 (Correct answer)
- 32
- 24
Correct answer: 30
Differences increase by 2 each time (4, 6, 8, 10), so 20 + 10 = 30.
Question 6: What number comes next? 1, 3, 6, 10, 15, ?
- 20
- 21 (Correct answer)
- 22
- 18
Correct answer: 21
These are triangular numbers; adding 6 gives 15 + 6 = 21.
Question 7: What number comes next? 64, 32, 16, 8, ?
- 2
- 4 (Correct answer)
- 6
- 3
Correct answer: 4
Each term is halved, so 8 / 2 = 4.
CAT4 Number Series 3
What number comes next? 1, 1, 2, 3, 5, ?