24®Game(Maths24) Variables single/double digits (48 Cards) Ages 9 & up

Object of the game is to make 24. You can add, subtract, multiply and divide. Use all four numbers on a card, but use each number only once. There is at least one solution to every card. Three levels of challenge.

Find a VARIABLE NUMBER (any whole number from 1 to 9) which, when used with the other numbers on the card, can make 24 on both wheels.