GMA Number Series 2

Question 1

What is the next number in the series: 3, 6, 12, 24, 48, ?

Accepted Answer

96

Answer

Each term is doubled: 3×2=6, 6×2=12, 12×2=24, 24×2=48, 48×2=96.

Question 2

Find the missing term: 81, 27, 9, ?, 1

Accepted Answer

3

Answer

Each term is divided by 3: 81÷3=27, 27÷3=9, 9÷3=3, 3÷3=1.

Question 3

What comes next in the series: 1, 4, 9, 16, 25, ?

Accepted Answer

36

Answer

These are perfect squares: 1²=1, 2²=4, 3²=9, 4²=16, 5²=25, 6²=36.

Question 4

Complete the series: 2, 3, 5, 8, 13, 21, ?

Accepted Answer

34

Answer

This is the Fibonacci sequence where each term equals the sum of the two preceding terms: 13+21=34.

Question 5

Find the next number: 100, 91, 82, 73, 64, ?

Accepted Answer

55

Answer

Each term decreases by 9: 100-9=91, 91-9=82, 82-9=73, 73-9=64, 64-9=55.

(GMA) General Mental Ability Practice Test