You use index cards to play a homemade game The object is to

You use index cards to play a homemade game. The object is to be the fi rst to get rid of all your cards. How many cards are in your friend’s stack? You have 48 stacked cards that are 12mm high. your friends stack is 5mm high.

Solution

48 cards for a total of 12 mm height

So, each card has height = 12/48 = 0.25 mm

Your pal\'s stack is 5 mm high
and each card is 0.25 mm high

So, the number of cards in your friends stack is :
5 / 0.25
500/25

20

So, your friend has 20 cards