Adam has some money to buy some stickers.
If he buys 10 stickers, he will have $9 left.
If he buys 20 stickers, he will need $11 more.
- How much does each sticker cost?
- How much money does he have?
(a)
Difference in the number of stickers in both scenarios
= 20 - 10
= 10
To buy 10 stickers, he needs to use $9 that is left and get an extra of $11.
Difference in the amount to pay in both scenarios
= 9 + 11
= $20
Adam needs $20 to buy 10 extra stickers .
Cost of 10 stickers = $20
Cost of 1 sticker = 20 ÷ 10 = $2
(b)
Amount that he has
= Cost of 10 stickers + 9
= 10 x 2 + 9
= 20 + 9
= $29
Answer(s): (a) $2; (b) $29