57. 7044-!-item-!-187;#058&005427
If n is a multiple of 5 and n = (p^2)q, where p and q are prime numbers, which of the following must be a multiple of 25 ?
(A) p^2
(B) q^2
(C) pq
(D) (p^2)(q^2)
(E) (p^3)q
嗚~我果然是問白痴題,這題都沒有人發問...
為什麼不是A?謝謝!
我的想法:25=5^2=(p^2)q
那,q不就是1了嗎?有沒有q都沒差了嘛~請指正!