Arithmetic

A calculation can be the whole task or part of a card decision

Mental Math Duel and Escoba de Quince both use arithmetic, but their decisions differ. One presents expressions to answer; the other combines visible card values with capture and scoring choices.

Choose a pace for direct calculations

Mental Math Duel offers 12-round duels against a visible pace rival, a 90-second daily challenge with 20 calculations and untimed Practice. Answers are nonnegative whole numbers. Easy uses addition and subtraction; other operations include multiplication and exact division.

Mental Math Duel

Fifteen is only the start of an Escoba move

A hand card and selected table cards must total fifteen. A capture that empties the table scores a sweep, while the collected cards also affect coins, sevens and card-majority scoring. Compare legal sums and what each capture leaves for the opponent.

Escoba de quince · Explore numbered logic grids