IBEW - Aptitude Test Aptitude Number Series 1 — Questions and Answers
Question 1: What is the next number in the series: 4, 8, 16, 32, 64, ___?
- 96
- 112
- 128 (Correct answer)
- 144
Correct answer: 128
Each term is multiplied by 2. Starting at 4: 4×2=8, 8×2=16, 16×2=32, 32×2=64, and 64×2=128.
Question 2: Find the missing number: 50, 44, 38, 32, 26, ___?
- 18
- 20 (Correct answer)
- 22
- 24
Correct answer: 20
Each term decreases by 6. 50−6=44, 44−6=38, 38−6=32, 32−6=26, and 26−6=20.
Question 3: What comes next in the series: 1, 4, 9, 16, 25, ___?
- 30
- 32
- 35
- 36 (Correct answer)
Correct answer: 36
Each term is a perfect square: 1²=1, 2²=4, 3²=9, 4²=16, 5²=25, and 6²=36.
Question 4: Identify the next term in the series: 3, 7, 13, 21, 31, ___?
- 39
- 41
- 43 (Correct answer)
- 45
Correct answer: 43
The differences between consecutive terms increase by 2 each time: +4, +6, +8, +10, +12. So 31+12=43.
Question 5: What is the next number: 2, 6, 18, 54, 162, ___?
- 270
- 324
- 486 (Correct answer)
- 540
Correct answer: 486
Each term is multiplied by 3: 2×3=6, 6×3=18, 18×3=54, 54×3=162, and 162×3=486.
Question 6: What comes next in the series: 10, 20, 30, 50, 80, ___?
- 110
- 120
- 130 (Correct answer)
- 140
Correct answer: 130
Each term is the sum of the two preceding terms: 10+20=30, 20+30=50, 30+50=80, and 50+80=130.
IBEW - Aptitude Test Aptitude Number Series 1
What is the next number in the series: 4, 8, 16, 32, 64, ___?