# FREE IBEW Aptitude Number Series Question and Answers

#### What is the following digit in this sequence?

1, 5, 9, 13, 17, _

Explanation:

The answer in this situation would be 21, since the rule for this pattern is to add 4 to the preceding number.

#### What is the following series of numbers' next number?

7 10 15 22 31

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.

#### What is the following digit in the series?

13, 9, 14, 8, 15, ___

Explanation:

Look at the distinctions between the terms; they are enclosed in brackets.

13 (-4) 9 (+5) 14 (-6) 8 (+7) 15…

The next term should be the result of subtracting 8 from 15.

15-8=7.

#### Find the following two terms in the list.

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

Explanation:

Since each number in the alternating sequence is unrelated to the one before it or the one after it, the applicant must perform two different calculations.

The first number and each subsequent number are related by adding 2 to the first, whereas the second number and each subsequent number are based on a straightforward one-digit subtraction. Thus, the following two numbers in the sequence are 56 and 12.

#### Find the omitted word.

4, 4, 8, 12, __, 32, 52

Explanation:

Finding the rule is made straightforward by knowing the Fibonacci sequence; in this instance, it is clear that the terms are the sum of the preceding two numbers.

Again, the process for determining the solution is the same despite if the missing number is in the midst of the series. The solution is 20 because the previous two phrases for the missing number are 8 and 12, respectively.

#### Find the series' omitted number.

120, 60, 30, __, 7.5, 3.25

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.