Question

solve 1&2 questions i have test today

plz,answer asap
dont spam​

Answer 1

1. For any number ending with 5 the prime factor 5 should be there in its primefactorisation (for eg: 5=5,15=3x5,25=5x5).

But 6n has only 2 and 3 as prime factors.So 6n can never end with digit 5 for any natural number n.

2. 7×5×3×2+3 = 213

Composite numbers are the numbers that have more than two factors.

Factors. of 213 = 1, 3, 71, 213

Hence, 7×5×3×2+3 is a composite number.

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