Charlie has some money to buy some stickers.
If he buys 9 stickers, he will have $18 left.
If he buys 11 stickers, he will have $10 left.
- How much does each sticker cost?
- How much money does he have?
(a)
Difference in the number of stickers in both scenarios
= 11 - 9
= 2
Difference in the amount to pay in both scenarios
= 18 - 10
= 8
Charlie needs $8 to buy 2 extra stickers.
Cost of 2 stickers = $8
Cost of 1 sticker = 8 ÷ 2 = $4
(b)
Amount that he has
= Cost of 9 stickers + 18
= 9 x 4 + 18
= 36 + 18
= $54
Answer(s): (a) $4; (b) $54