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An easy riddle
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Transgene waterlilies
Thanks Bléro for this riddle

A new sort of waterlily has just been created by a laboratory.
These transgene waterlilies have the following properties:
In the pond of the laboratory, a waterlily doubles of surface every day, after 30 days it recover all the pond.

How long would it be necessary for 2 waterlilies to cover half of the surface of this pond?

This riddle keeps you busy already since

Congratulations Patjol on his solution of the 06/15/04 but don't look at it, it's always better to find oneself...
If you want to see the (false) solutions which were sent to me.
Last edit for this page: 09/06/2011 (03h22pm)