Crossover Aptitude Test Numerical Reasoning: Number Sequences 5 — Questions and Answers
Question 1: What is the next term: 6, 11, 21, 41, 81, ?
- 141
- 151
- 161 (Correct answer)
- 162
Correct answer: 161
Each term is roughly doubled minus 1: (81 × 2) − 1 = 161.
Question 2: Find the missing number: 1, 4, 13, 40, ?, 364
- 100
- 121 (Correct answer)
- 133
- 145
Correct answer: 121
Each term is multiplied by 3 and then 1 is added: (40 × 3) + 1 = 121.
Question 3: Which number comes next: 2, 3, 5, 7, 11, 13, ?
- 14
- 15
- 17 (Correct answer)
- 19
Correct answer: 17
These are prime numbers in order; the next prime after 13 is 17.
Question 4: What is the missing value: 64, 32, ?, 8, 4
- 20
- 16 (Correct answer)
- 18
- 14
Correct answer: 16
Each term is halved, so 32 ÷ 2 = 16.
Question 5: Find the next number: 3, 6, 11, 18, 27, ?
- 36
- 37
- 38 (Correct answer)
- 39
Correct answer: 38
Differences are 3, 5, 7, 9, 11 (odd numbers increasing by 2), so 27 + 11 = 38.
Question 6: Complete the sequence: 144, 121, 100, 81, ?
- 64 (Correct answer)
- 60
- 56
- 72
Correct answer: 64
These are perfect squares descending: 12², 11², 10², 9², so next is 8² = 64.
Question 7: What is the next term: 1, 2, 4, 7, 11, 16, ?
- 20
- 21
- 22 (Correct answer)
- 23
Correct answer: 22
Differences increase by 1 each step (1, 2, 3, 4, 5, 6), so 16 + 6 = 22.
Crossover Aptitude Test Numerical Reasoning: Number Sequences 5
What is the next term: 6, 11, 21, 41, 81, ?