Some girls are playing card games. If each of them is given 9 cards, there will be 10 cards left. If each of them is given 7 cards, there will be 22 cards left.
- How many girls are there?
- How many cards are there?
(a)
Number of extra cards for the girls
= 22 - 10
= 12
Number of extra cards for each girl
= 9 - 7
= 2
Number of girls
= 12 ÷ 2
= 6
(b)
Number of cards
= 9 x 6 + 10
= 54 + 10
= 64
Answer(s): (a) 6; (b) 64