Adam has some money to buy some stickers.
If he buys 10 stickers, he will have $7 left.
If he buys 15 stickers, he will need $3 more.
- 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
To buy 5 stickers, he needs to use $7 that is left and get an extra of $3.
Difference in the amount to pay in both scenarios
= 7 + 3
= $10
Adam needs $10 to buy 5 extra stickers .
Cost of 5 stickers = $10
Cost of 1 sticker = 10 ÷ 5 = $2
(b)
Amount that he has
= Cost of 10 stickers + 7
= 10 x 2 + 7
= 20 + 7
= $27
Answer(s): (a) $2; (b) $27