IBEW - Aptitude Test Aptitude Number Series 1

Question 1

What is the next number in the series: 4, 8, 16, 32, 64, ___?

Accepted Answer

128

Answer

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, ___?

Accepted Answer

20

Answer

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, ___?

Accepted Answer

36

Answer

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, ___?

Accepted Answer

43

Answer

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, ___?

Accepted Answer

486

Answer

Each term is multiplied by 3: 2×3=6, 6×3=18, 18×3=54, 54×3=162, and 162×3=486.

IBEW - Aptitude Test Practice Test