Question

Explain 5 × 4×2×1+5 and 17×15×13×11×9×7×5×3×1+7 are composite number .

Answer 1

it is composite number because it has factor other than 2 and itself simple

Answer 2

Hi ,

Any number which has more than two factors

is called composite number.

Now ,

1 ) 5 × 4 × 2 × 1 + 5

= 5 ( 4 × 2 × 1 + 1 )

= 5 ( 8 + 1 )

= 5 × 9 × 1 ( more than two factors )

= composite number

2 ) 17 ×15 × 13 × 11 × 9 × 7 × 5 × 3 × 1 + 7

= 7 ( 17×15×13×11×9×5×3 + 1 )

= 7 × m [ m = 17 × 15 ×13×11×9×5×3+1 ]

= 7 × m × 1 ( more than two factors )

= composite number

I hope this helps you.

: )