Students from Finish, French, Italian, Polish, Turkish and Spanish schools have create this blog during the international workshop held in Badajoz, Spain, in December 2014.
9/12/14
RIDDLE 30: THE STOLEN BOOKS.
In a
library 154 books have been stolen. Among these, the books with a white cover
are 3 less than those with a red cover and 5 more than those with a green cover.
How many
books with a green cover, white cover and red cover have been stolen?
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