黄金62. The following appeared in the letters-to-the-editor section of a local newspaper.

“Muscle Monthly, a fitness magazine that regularly features pictures of bodybuilders using state-of-the-art exercise machines, frequently sells out, according to the owner of Skyview Newsstand. To help maximize fitness levels in our town's residents, we should, therefore, equip our new community fitness center with such machines.”

39. “It is difficult for people to achieve professional success without sacrificing important aspects of a fulfilling personal life.”

1.      K為20至40所有總數和(inclusive20,40),問K最大質因數

       Ans:7 （总和为630）

1.      (128)政府收税,每100$ 收取0.47$,問收税是多少%?

       Ans: 0.47%

1.      3^10*3^12x最接近那個數

       Ans:10^23

1.      DS題一個組，其female:male:children的比例是5:2:7 求總人數
(1) female+children有12人
(2) male小於4人

       Ans

1.      问要加入多少重量的A溶液(solution)到n重量的B溶液(solution)里才能使混合液的salt质量百分比到达c％？已知A溶液的salt的weight百分比为a%, B溶液质量为b%

(a,b,c,n都是已知的数，不过我忘了)