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Arithmetic Puzzles

Arithmetic puzzles are Mad Libs for math: fill in the blanks with numbers or operations to make the equation true.

Hanging Balances

         

In the above diagram, how many blue circles should go in the ? to make it balance?


Note: Assume the hangers and wire are all weightless and each hanger is symmetric.

In the above diagram, how many yellow triangles should go in the ? to make it balance?


Note: Assume the hangers and wire are all weightless and each hanger is symmetric.

In the above diagram, how many red squares should go in the ? to make it balance?


Note: Assume the hangers and wire are all weightless and each hanger is symmetric.

In the above diagram, what should go in the ? to make it balance?


Note: Assume the hangers and wire are all weightless and each hanger is symmetric.

According to the diagram above, one green pentagon weighs as much as how many red squares?


Note: Assume the hangers and wire are all weightless and each hanger is symmetric.

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