Basic Ability Test Basic Ability Number Series and Sequences 5 — Questions and Answers
Question 1: Identify the next term: 5, 10, 17, 26, 37, ___?
- 48
- 49
- 50 (Correct answer)
- 51
Correct answer: 50
Differences are 5,7,9,11,13 (odd numbers increasing by 2), so 37 + 13 = 50.
Question 2: What is the missing value? 6, 12, 24, 48, ___, 192
- 72
- 84
- 96 (Correct answer)
- 108
Correct answer: 96
Each term doubles, so 48 × 2 = 96.
Question 3: Complete the series: 1000, 500, 250, 125, ___?
- 50
- 60
- 62.5 (Correct answer)
- 75
Correct answer: 62.5
Each term is halved, so 125 ÷ 2 = 62.5.
Question 4: Find the next number in: 3, 8, 15, 24, 35, ___?
- 45
- 46
- 47
- 48 (Correct answer)
Correct answer: 48
Differences are 5,7,9,11,13 — each increases by 2 — so 35 + 13 = 48.
Question 5: What comes next? 1, 3, 7, 15, 31, ___?
- 47
- 57
- 63 (Correct answer)
- 65
Correct answer: 63
Each term is doubled and then 1 is added: (31 × 2) + 1 = 63.
Question 6: Which number is missing? 25, 36, 49, 64, ___?
- 75
- 80
- 81 (Correct answer)
- 100
Correct answer: 81
These are perfect squares (5²,6²,7²,8²,9²), so the next is 9² = 81.
Question 7: What is the next term? 2, 5, 11, 23, 47, ___?
- 90
- 94
- 95 (Correct answer)
- 96
Correct answer: 95
Each term is doubled and then 1 is added: (47 × 2) + 1 = 95.
Basic Ability Test Basic Ability Number Series and Sequences 5
Identify the next term: 5, 10, 17, 26, 37, ___?