Question

Which value of n makes the value of the expression 4n + 3 a composite number

Answer 1

3

Explanation:

Given expression :-

• 4n + 3

It will be composite if it will has more than 2 factors ( other than 1 and itself )

If n = 1 :-

• 4*1 + 3
• 4+ 3
• 7 ( prime )

If n = 2 :-

• 4*2 + 3
• 8 + 3
• 11 ( prime )

If n = 3 :-

• 4*3+3
• 12+3
• 15 ( composite )