Select a shape by clicking on it (or dragging and dropping it onto your pan).
Continue to add shapes until the scale is balanced.
If you have added too much, you may remove any shape from your pan by clicking on it (or dragging and dropping it off your pan).
When the scale is balanced you will see the equation you have created!
Levels
Beginner - the total will be between 1 and 20, inclusive.
Intermediate - the total will be between 21 and 40, inclusive.
Advanced - the total will be between 41 and 60, inclusive.
Expert challenges
Any shape once - the total will be between 1 and 55, inclusive. You may select any shape, but each shape can only be placed on the pan once.
One shape multiples - the total will be a product (composite number aka no primes) between 2 and 60, inclusive. You may select a single shape any number of times, and you may not select any other shape.