EIAT Number Series and Pattern Recognition

Question 1

What number comes next in the series: 2, 4, 8, 16, ___?

Accepted Answer

32

Answer

Each term is doubled, so 16 × 2 = 32.

Question 2

Find the missing number: 3, 6, 9, ___, 15.

Accepted Answer

12

Answer

This is an arithmetic sequence adding 3 each time, so 9 + 3 = 12.

Question 3

What comes next in the sequence: 1, 1, 2, 3, 5, 8, ___?

Accepted Answer

13

Answer

Each term is the sum of the two preceding terms (Fibonacci sequence): 5 + 8 = 13.

Question 4

What is the next number: 100, 90, 81, 73, ___?

Accepted Answer

66

Answer

The differences decrease by 1 each time (10, 9, 8, 7), so 73 − 7 = 66.

Question 5

Find the next term: 5, 10, 20, ___, 80.

Accepted Answer

40

Answer

Each term is multiplied by 2, so 20 × 2 = 40.

EIAT - Elevator Industry Aptitude Test Practice Test