Adam has some money to buy some stickers.
If he buys 3 stickers, he will need $2 more.
If he buys 10 stickers, he will need $9 more.
- How much does each sticker cost?
- How much money does he have?
(a)
Difference in the number of stickers in both scenarios
= 10 - 3
= 7
Difference in the amount to pay in both scenarios
= 9 - 2
= $7
Adam needs $7 to buy 7 extra stickers.
Cost of 7 stickers = $7
Cost of 1 sticker = 7 ÷ 7 = $1
(b)
Amount that he has
= Cost of 3 stickers - 2
= 3 x 1 - 2
= 3 - 2
= $1
Answer(s): (a) $1; (b) $1