Required Mathematical Intelligence

Chapter 109

There are several white rabbits and black rabbits in a cage. If you take out 2 black rabbits, the number of white rabbits and black rabbits is equal. If you take out 1 white rabbit, the number of black rabbits is twice that of white rabbits.How many white rabbits and black rabbits are there?
[答案：白兔是4只，黑兔是6只。如果少2只黑兔，白兔与黑兔只数相等，可见黑兔比白兔多2只。少1只白兔，黑兔将比白色多2 1=3（只），这时黑兔是白兔的2倍。所以白兔是3÷（2-1） 1=4（只），黑兔是4 2=6（只）。]
(End of this chapter)