how old is Scott ?

　　Seven years ago, Scott was 3 times as old as Kathy was at that time. If Scott is now 5 years older than Kathy, how old is Scott ?　　12.5　　13　　14　　14.

　　Seven years ago, Scott was 3 times as old as Kathy was at that time. If Scott is now 5 years older than Kathy, how old is Scott ?

　　12.5

　　13

　　14

　　14.5

答案：14.5，这是一道稍复杂的计算题，设Scott七年前的年龄为X，则有X+7-（1/3X+7）=5，由此可得X=71/2，再加上7即是Scott现在的年龄，因此该选141/2。