Basic Ability Test Basic Ability Number Series and Sequences 3 — Questions and Answers
Question 1: What comes next: 1, 1, 2, 6, 24, ___?
- 48
- 96
- 120 (Correct answer)
- 100
Correct answer: 120
Each term is multiplied by an increasing integer (×1, ×2, ×3, ×4, ×5), so 24 × 5 = 120.
Question 2: Find the missing number in: 7, 14, 21, ___, 35, 42
- 24
- 26
- 27
- 28 (Correct answer)
Correct answer: 28
These are multiples of 7, so the missing term is 7 × 4 = 28.
Question 3: What is the next term? 0.5, 1, 2, 4, 8, ___?
- 12
- 14
- 16 (Correct answer)
- 18
Correct answer: 16
Each term is multiplied by 2, so 8 × 2 = 16.
Question 4: Complete the series: 50, 44, 38, 32, ___?
- 24
- 25
- 26 (Correct answer)
- 28
Correct answer: 26
Each term decreases by 6, so 32 − 6 = 26.
Question 5: Identify the next number: 2, 6, 18, 54, ___?
- 108
- 126
- 144
- 162 (Correct answer)
Correct answer: 162
Each term is multiplied by 3, so 54 × 3 = 162.
Question 6: Which number is missing? 10, 13, 17, 22, 28, ___?
- 34
- 35 (Correct answer)
- 36
- 37
Correct answer: 35
Differences increase by 1 each step (3,4,5,6,7), so 28 + 7 = 35.
Question 7: What fills the blank? 729, 243, 81, 27, ___, 3
- 6
- 9 (Correct answer)
- 12
- 18
Correct answer: 9
Each term is divided by 3, so 27 ÷ 3 = 9.
Basic Ability Test Basic Ability Number Series and Sequences 3
What comes next: 1, 1, 2, 6, 24, ___?