[問題]GWD27-8

[magic]

Q8:
Which of the following fractions has a decimal equivalent that is a terminating decimal?

A.10/189
B.15/196
C.16/225
D.25/144
E.39/128

請問這該怎麼判斷壓
答案是E

[spreewell]

原則上分母有2或5的因數會比較有可能整除，但這題依此原則僅能刪去一個選項，其餘可能就得實際操作算出答案。

[magic]

真的要硬算阿
= ="
ETS真狠