Crossover Aptitude Test Numerical Reasoning: Number Sequences 4 — Questions and Answers
Question 1: What is the next number: 1, 3, 7, 15, 31, ?
- 47
- 57
- 63 (Correct answer)
- 61
Correct answer: 63
Each term is doubled and 1 is added: (31 × 2) + 1 = 63.
Question 2: Find the missing value: 81, 27, 9, ?, 1
- 4
- 3 (Correct answer)
- 2
- 5
Correct answer: 3
Each term is divided by 3, so 9 ÷ 3 = 3.
Question 3: Which number completes the sequence: 5, 11, 17, 23, ?, 35
- 27
- 28
- 29 (Correct answer)
- 31
Correct answer: 29
The sequence increases by 6 each time, so 23 + 6 = 29.
Question 4: What comes next: 0, 1, 3, 6, 10, 15, ?
- 18
- 20
- 21 (Correct answer)
- 22
Correct answer: 21
These are triangular numbers; differences increase by 1 each time (1,2,3,4,5,6), so 15 + 6 = 21.
Question 5: Find the next term: 1000, 500, 250, 125, ?
- 50
- 60
- 62.5 (Correct answer)
- 65
Correct answer: 62.5
Each term is halved, so 125 ÷ 2 = 62.5.
Question 6: What is the missing number: 2, 4, 8, 14, 22, ?, 44
- 28
- 30
- 32 (Correct answer)
- 34
Correct answer: 32
Differences are 2, 4, 6, 8, 10, 12; so 22 + 10 = 32.
Question 7: Complete the sequence: 17, 13, 9, 5, ?
- 0
- 1 (Correct answer)
- 2
- 3
Correct answer: 1
The sequence decreases by 4 each time, so 5 − 4 = 1.
Crossover Aptitude Test Numerical Reasoning: Number Sequences 4
What is the next number: 1, 3, 7, 15, 31, ?