Question

are the following number prime or composite. show by finding the factor (a)9 (b)48 (c)89 (d)96 (e)78 (f)101​

Answer 1

Explanation:

(a) 9=>3×3. Hence it is composite as 9 is divisible by 3.

(b) 2|48

2|24

2|12

2|6

3|3

|1 =>48=2×2×2×2×3. Hence 48 has factors other than 1 and itself so it is composite.

(c)89 is prime as it has factors 1 and itself.

(d)

2|96

2|48

2|24

2|12

2|6

3|3

|1 => 96 has factors than 96 and 1 so 96 is composite.

(e) 2|78

3|39

13|13

|1 => 78 is composite.

(d) 101 is prime as it has factors 1 and itself. Hope it helps you.