this is to figure out what numbers the symbols represent.
start with the first equation: three shoe symbols added together equals 30, meaning that the shoe symbol represents the number 10.
then 10 + c + c = 20, so each cat represents the number 5.
watch out though — not all of the cats are the same.
you can read a full explanation of how to solve the riddle from reader's digest here.
which cup would be filled with coffee first?
if you look closely, you can see that all of the pipes in the image are blocked except for the ones leading to cup number five.
how many triangles are there in this photo?
after this 