Numerical Reasoning Number Series and Sequences 1 — Questions and Answers
Question 1: What is the next number in the sequence: 3, 7, 11, 15, 19, __?
- 23 (Correct answer)
- 21
- 25
- 22
Correct answer: 23
The sequence increases by 4 each time; 19 + 4 = 23.
Question 2: What is the missing number: 2, 6, 18, 54, __, 486?
- 162 (Correct answer)
- 108
- 216
- 144
Correct answer: 162
Each term is multiplied by 3; 54 × 3 = 162.
Question 3: Find the next term: 1, 4, 9, 16, 25, __?
- 36 (Correct answer)
- 30
- 49
- 32
Correct answer: 36
These are perfect squares: 1²=1, 2²=4, 3²=9, 4²=16, 5²=25, 6²=36.
Question 4: What number comes next: 100, 92, 84, 76, 68, __?
- 60 (Correct answer)
- 62
- 58
- 64
Correct answer: 60
The sequence decreases by 8 each time; 68 − 8 = 60.
Question 5: Identify the missing number: 1, 1, 2, 3, 5, 8, 13, __?
- 21 (Correct answer)
- 18
- 24
- 20
Correct answer: 21
This is the Fibonacci sequence; each term equals the sum of the two preceding terms: 8+13 = 21.
Question 6: What is the next number: 5, 10, 20, 40, 80, __?
- 160 (Correct answer)
- 120
- 200
- 100
Correct answer: 160
Each term is multiplied by 2 (doubling); 80 × 2 = 160.
Numerical Reasoning Number Series and Sequences 1
What is the next number in the sequence: 3, 7, 11, 15, 19, __?