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Brain Teasers

Week 27 - Thursday

#474

A celebration cake is cut into pieces.

In the first hour one fifth of the cake is eaten.

The next hour one third of the remainder is eaten.

The following hour one quarter of the remaining pieces are eaten

and in the fourth hour half of the remaining cake is eaten.

There are still 10 pieces of cake left.

How many pieces of cake have been eaten?

Show Answer

40.