Question

wrong number in series8,9,21,39,79,140,204​

Answer 1

Answer:

I think the answer of above series is

39

Answer 2

Given : Number series 8, 9, 21, 39, 79,140,204

To Find: Wrong Number in the series

Step-by-step explanation:

• 79 is the wrong number in the series.
• Every other number is a composite number but 79 is a prime number.
• Prime Numbers are defined as numbers which are divisible by only 2 numbers that are 1 and the number itself.
• Composite Numbers are numbers which are divisible by numbers other than itself and 1.
• Now, when I say divisible I mean that when a number divides other number the remainder must be 0.
• 8 is divisible by 2, 4 ; 9 is divisible by 3; 39 is divisible by 3; 140 is divisible 2 and 204 by 2 and 3.