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between the Næstved Gymnasium in Denmark and the LP2I in France

Enigma A
A shell is fixed on the hull of a boat, with 3 meters above level of water. Water goes up 2 centimetres per hour.
In how long will water touch the shell?
Enigma B
An Earthworm of 50 G, a millepatte of 30 G and a grasshopper of 20 G want to pass a river.
At their disposal, a sheet of tree which can carry to the maximum only 60 G. How will they reach that point?
Enigma C
A water lily is in a lake. Every day it doubles of size. After 15 days, it makes half of the lake. How long will it put to entirely cover the lake?
Enigma D
Let us suppose that we have you and me as much money.
How much do I have to give you so that you have 10F moreover than me?
Enigma E
A bookseller buys a book of maths (=D) 70F, sells it 80F, ransoms it 90F, resells it 100F. Which was its benefit?

Posted in Group5.

– 13 June 2009

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