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For once, 13 is a lucky number! Make the most of it!
People are getting on and off the bus. Find out what happens!
With a few operations, find the values of the three dice!
Cut squares out of rectangles!
Help Benjamin and his mother prepare for their trip!
Listen up, brave adventurers! Can you guess what the chief won?
Watch out! There’s an explosion of water lilies in the pond!
This arithmetical triangle can guess your card every time!
Impress your friends with your amazing calculation skills!