Win as many cards as you can by scoring tries. A try is scored by adding, subtracting, multiplying or dividing the cards in your hand to make 15. You can use 1, 2, 3, or all 4 cards to make 15. You can only score one try per turn.
How to score
Click on a card then click on the space you want to place it. Choose an operation (e.g. +, -, X, ÷) when there is more than one card, and repeat until you have made 15. Click on the answer box when you have made 15, this will finish your turn. You can also insert brackets by clicking on the numbers in orange above your equation cards.
What if I can't score?
If you can’t make 15 swap one of your cards with one from the pile by clicking on your card and then the pile. This will end your turn. Once all cards in the pickup pileare gone this action will simply end your turn.
How do I win?
You can see your points in the blue box next to your cards. The computer's points are next to it's cards. You get one point for every card you use to make 15. You must score more points than the computer to win the game.
The game finishes when there are no more cards to pickup and both players cannot make 15.