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OoOoOoO (石头阵) 于 (Wed Sep 5 16:47:42 2007) 提到:
There are 100 butterflies in a garden on Sunday.
Each day there are 10 new butterflies flying in.
On average each butterfly stays in the garden for 4 days.
What is the number of butterflies in the garden the next Sunday
(7 days later)?
Thank you
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chairmancat (猫主席) 于 (Wed Sep 5 17:23:48 2007) 提到:
40
