灵鹊做题网2012年5月sat数学一道题
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2012年5月sat数学一道题
a store gas gift certifications in the amount of $5,$10,$15,$20,and$50.Sue gave Bill gift certificates from the store that totaled exactly$235.If she used the minimum number of certificates,how many $10 certificated did she give Bill?
为什么是none
a store gas gift certifications in the amount of $5,$10,$15,$20,and$50.Sue gave Bill gift certificates from the store that totaled exactly$235.If she used the minimum number of certificates,how many $10 certificated did she give Bill?
为什么是none
sat数学题不需要知道题准确的意思,以此来提升速度,节省时间,为其他项目节省精力.意思就是说,用a个5,b个10,c个15,d个20和e个50组成235,a+b+c+d+e为最小值时,b为多少.很明显4个50,一个20和一个15.不需要10那种certificate,所以答案是none