Adam has some money to buy some stickers.
If he buys 3 stickers, he will have $18 left.
If he buys 13 stickers, he will have $8 left.
- How much does each sticker cost?
- How much money does he have?
(a)
Difference in the number of stickers in both scenarios
= 13 - 3
= 10
Difference in the amount to pay in both scenarios
= 18 - 8
= 10
Adam needs $10 to buy 10 extra stickers.
Cost of 10 stickers = $10
Cost of 1 sticker = 10 ÷ 10 = $1
(b)
Amount that he has
= Cost of 3 stickers + 18
= 3 x 1 + 18
= 3 + 18
= $21
Answer(s): (a) $1; (b) $21