8FillTheHeart
08-03-2009, 06:30 PM
My college-age ds learned this from a Chinese grad student this summer. It is great and my math-geek/competitive kids love it!!
You simply flip up four cards. Cards are worth face value, Jacks-11, Queens-12, Kings-13, and Aces are either worth 1 or 14.
Using addition, subtraction, multiplication, division, exponents, or roots make the cards total 24. FWIW......there have only been a very few we couldn't solve.
For example, the cards flipped up 9, 4, 3, and Ace. There are 2 ways we solved: Ace=1+4=5*3=15+9=24
9-3=6*4=24* Ace as 1=24
Another example: 8, 8, 10, 7 8*10= 80- (7*8)= 24
One more: J, Q, 6, 7
J+Q=23+ (7-6)= 24
Last example: Ace,7,6, 6 Ace as 14/7=2*(6+6)=24
Fastest one wins!! Have fun!
You simply flip up four cards. Cards are worth face value, Jacks-11, Queens-12, Kings-13, and Aces are either worth 1 or 14.
Using addition, subtraction, multiplication, division, exponents, or roots make the cards total 24. FWIW......there have only been a very few we couldn't solve.
For example, the cards flipped up 9, 4, 3, and Ace. There are 2 ways we solved: Ace=1+4=5*3=15+9=24
9-3=6*4=24* Ace as 1=24
Another example: 8, 8, 10, 7 8*10= 80- (7*8)= 24
One more: J, Q, 6, 7
J+Q=23+ (7-6)= 24
Last example: Ace,7,6, 6 Ace as 14/7=2*(6+6)=24
Fastest one wins!! Have fun!