Charlie has some money to buy some stickers.
If he buys 10 stickers, he will have $21 left.
If he buys 15 stickers, he will have $6 left.
- How much does each sticker cost?
- How much money does he have?
(a)
Difference in the number of stickers in both scenarios
= 15 - 10
= 5
Difference in the amount to pay in both scenarios
= 21 - 6
= 15
Charlie needs $15 to buy 5 extra stickers.
Cost of 5 stickers = $15
Cost of 1 sticker = 15 ÷ 5 = $3
(b)
Amount that he has
= Cost of 10 stickers + 21
= 10 x 3 + 21
= 30 + 21
= $51
Answer(s): (a) $3; (b) $51