Free IBEW Aptitude Number Series Question and Answers 1

Question 1

What is the following digit in the series?

13, 9, 14, 8, 15, ___

Accepted Answer

7

Answer

This is an alternating series with two distinct patterns. The numbers in the odd positions (1st, 3rd, 5th) increase by 1 (13, 14, 15). The numbers in the even positions (2nd, 4th) decrease by 1 (9, 8). Following the even position pattern, the next number after 8 is 7.

Question 2

What is the following digit in this sequence?

1, 5, 9, 13, 17, _

Accepted Answer

21

Answer

This is an arithmetic sequence where each subsequent number is obtained by adding a constant value to the previous one. The common difference between consecutive terms is 4 (5-1=4, 9-5=4, 13-9=4, 17-13=4). Therefore, the next digit in the sequence is 17 + 4 = 21.

Question 3

Find the following two terms in the list.

7, 18, 14, 16, 28, 14, __, __

Accepted Answer

56, 12

Answer

This sequence consists of two interleaved patterns. The first pattern (odd positions: 7, 14, 28) involves multiplying by 2, so the next term is 28 * 2 = 56. The second pattern (even positions: 18, 16, 14) involves subtracting 2, so the next term is 14 - 2 = 12. Thus, the following two terms are 56 and 12.

Question 4

Find the series' omitted number.

120, 60, 30, __, 7.5, 3.25

Accepted Answer

15

Answer

Explanation:
Even though the missing number is in the midst of this sequence, the same method as earlier can be used to solve it. Each number is related to the preceding number by dividing it by two, and it's crucial to realize that terms in a series don't necessarily have to be integers. The answer to this query's missing term is 15.

Question 5

What is the following series of numbers' next number?

7 10 15 22 31

Accepted Answer

42

Answer

Explanation:
Every step increases the difference between each phrase by two. Thus, the difference between the series' last displayed number and the following number should be 9 + 2 = 11.

As a result, 31 + 11 = 42 is the series' following number.

IBEW - Aptitude Test Practice Test

IBEW - Aptitude Test Practice Test

Free IBEW Aptitude Number Series Question and Answers 1