PP-T2-DS11

[emmaaqua]

What is the value of the positive integer m ?

(1)When m is divided by 6, the remainder is 3.

(2)When 15 is divided by m, the remainder is 6.

Ans:B

我選的答案是"E"
因為在(1)M=9.15.21.27.33.39.45.57.57...=>Insufficient
(2)M=21.36.51...=>Insuffficient

(1)+(2) M=21.51...

DS的解答要求唯一性,所以我選了"E"

請問我是不是漏了步驟呢?
謝謝~

[Huang Hsin-Yi]

根據第二項
只有M=9 remainder is 6---->sufficient

[emmaaqua]

了解!!謝謝~^^