This game is adapted from one of Joyce's books (Comprehensive curriculum for gifted learners, 2d ed); my former students loved it! Your family can easily build a Krypto deck out of index cards. If you want to see the entire Krypto challenge, email me, and I will send it.
Read on and have fun!
"The game of Krypto is a card game that uses a deck of cards numbered 1-25 (three each of cards
l-10, two each of cards 1-17, and one each of cards 18-25), A hand of five cards is dealt, then a
sixth card that serves as a target number is dealt. The object of the game is to use all five cards in any
order combined with any of the operations of addition, subtraction, multiplication, and/or division to obtain a result that is given by the number on the target card. Solutions may not be unique. Some
hands may be unsolvable (packaging indicates this is the case in about 1/3,000 hands).
Card-1 Card-2 Card-3 Card-4 Card-5
Example: Hand dealt: 5 12 3 7 20
Target card: 2
Possible solution: 12 divided by (3 x 7 -20 + 5). See they way in which all of the numbers on the cards listed above (5,12, 3, 7, and 20) produced the number on the target card (2).
Play Krypto with a partner or small group. Call "Krypto" when you think you have a solution; present it orally. Keep track of how many hands you win.
Bonus question: How do you think the developers of the game concluded that about 1 in every 3,000 hands is