Fast

Slow

This is a game for two players P and Q. As the cards appear players should mentally round the values off to the nearest whole number. If the rounded values are the same there is a race to say 'snap' and to press the p or q key on the keyboard (or touch a yellow button above if using a tablet, slate or iPad.).
One point is earned for a correct snap but a point is subtracted for a mistake. The first player to score twenty is the winner.