Answer to Question #107812 in Algebra for Mike

Question

Justify 7|280

Answer 1

Since, $280=2×2××2×5×7$

$=2^3×5×7$ , is a prime factorization of 280 and 7 is one of the prime factor of 280.

Hence ,$7\mid (2^3×5×7)$

$\therefore \ 7\mid 280.$