IBEW Number Sequences and Patterns 4 — Questions and Answers
Question 1: Which number is next: 1, 2, 6, 24, 120, ___?
- 480
- 600
- 720 (Correct answer)
- 840
Correct answer: 720
These are factorials (1!, 2!, 3!, 4!, 5!), so the next is 6! = 720.
Question 2: Find the next value: 256, 64, 16, 4, ___?
- 0
- 1 (Correct answer)
- 2
- 3
Correct answer: 1
Each term is divided by 4, so 4 ÷ 4 = 1.
Question 3: What is the missing number: 11, 22, 33, ___, 55, 66?
- 40
- 42
- 44 (Correct answer)
- 48
Correct answer: 44
These are multiples of 11, so the missing term is 11 × 4 = 44.
Question 4: Complete the pattern: 2, 6, 18, 54, 162, ___?
- 324
- 432
- 486 (Correct answer)
- 540
Correct answer: 486
Each term is multiplied by 3, so 162 × 3 = 486.
Question 5: What comes next: 1, 3, 7, 15, 31, ___?
- 47
- 55
- 63 (Correct answer)
- 65
Correct answer: 63
Each term is doubled then 1 is added, so 31 × 2 + 1 = 63.
Question 6: Find the next number: 10, 9, 7, 4, 0, ___?
- −4
- −5 (Correct answer)
- −6
- −7
Correct answer: −5
The differences decrease by 1 each time (−1, −2, −3, −4, −5), so 0 − 5 = −5.
Question 7: Which number completes the sequence: 8, 16, 12, 24, 20, 40, ___?
- 32
- 34
- 36 (Correct answer)
- 38
Correct answer: 36
The pattern alternates ×2 and −4, so 40 − 4 = 36.
IBEW Number Sequences and Patterns 4
Which number is next: 1, 2, 6, 24, 120, ___?