Question

2,6,18,82,650 find odd one out

Answer 1

2 = 2×1
6 = 2×3
18 = 2×9
82 = 2×41
650 = 2×325

here , 2 is only prime number and others are composite . Hence , 2 is odd one out .

Answer 2

Answer: 2 (Because 2 is prime while others are composite numbers)

Concept: A number having factors only 1 and the number itself, then the number is known as prime number.

A number having factors other than 1 and the number itself, then the number is known as composite number.

Given:

2,6,18,82,650

To find: The odd one out from the given data.

Step-by-step explanation:

Factorising 2 we get

2 = 2x1

Factorising 6 we get

6 = 2x3

Factorising 18 we get

18 = 2x9

Factorising 82 we get

82 = 2x41

Factorising 650 we get

650 = 2x325

From the above factorizations

we can conclude that only 2 is prime number while others are composite number

Answer: 2 (Because 2 is prime while others are composite numbers)

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