Required Mathematical Intelligence

Chapter 107 The Frog Catches Bugs

Two frogs, big and small, compete to catch bugs. The big frog catches more than the small frog.If the little frog gave the big frog 3 of the bugs it caught, the big frog would catch three times as many as the little frog.If the big frog gives 3 worms to the small frogs, the big and small frogs will catch the same number of worms.Do you know how many bugs each frog and frog caught?
[答案：大青蛙捉了51只虫子，小青蛙捉了21只虫子。大青蛙比小青蛙多捉虫子15 15=30（只），如果小青蛙把捉的虫子给大青蛙3只，则大青蛙比小青蛙多虫子30 3×2=36（只），这时大青蛙捉的虫子是小青蛙的3倍，所以1倍就是（30 3×2）÷（3-1）=18（只），小青蛙捉虫子18 3=21（只），大青蛙捉虫子21 15×2=51（只）。]
(End of this chapter)