PrimePak - Factor Thinking Games Master multiplication facts and divisibility rules while having fun playing card games with this unique deck of 171 cards. In all four games players form factor sets.
Factor sets can have more than three numbers.
Prime wild cards are used for prime numbers only. Ages 7 to Adult. Challenges are made by opponents when a player overlooks factor sets or makes a mistake. Prime Solitaire - To win, a player must clear a foundation by forming factor sets . This must be done before going through the draw pile once, one card at a time.