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Series and Odd Man out Practice Test 4

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Question : 6 of 40

Marks: +1, -0

30, 44, 56, 72, 90

56
44
90
30
72

Solution:

Concept:

The series follows the pattern

n^2 - n

for consecutive values of

n

.

Explanation:

Write each term as

n(n-1)

.

For

n=6

:

6^2-6=30

.

For

n=7

:

7^2-7=42

, not

44

.

For

n=8

:

8^2-8=56

.

For

n=9

:

9^2-9=72

.

For

n=10

:

10^2-10=90

.

So

44

does not fit the pattern and is the odd term.

Answer:

44

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