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Number series coding and Decoding and odd man out

Question : 51 of 51

Marks: +1, -0

16,25,36,72,144,196,225

Solution:

Concept:

Identify the number that does not belong to a common pattern (perfect squares).

Explanation:

The series

16, 25, 36, 72, 144, 196, 225

includes perfect squares:

16=4^2

25=5^2

36=6^2

144=12^2

196=14^2

225=15^2

72

is not a perfect square.

Among the given options (

36, 72, 196, 225

), only

72

is not a perfect square.

Answer:

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