Adam has some money to buy some stickers.
If he buys 4 stickers, he will have $11 left.
If he buys 11 stickers, he will need $10 more.
- How much does each sticker cost?
- How much money does he have?
(a)
Difference in the number of stickers in both scenarios
= 11 - 4
= 7
To buy 7 stickers, he needs to use $11 that is left and get an extra of $10.
Difference in the amount to pay in both scenarios
= 11 + 10
= $21
Adam needs $21 to buy 7 extra stickers .
Cost of 7 stickers = $21
Cost of 1 sticker = 21 ÷ 7 = $3
(b)
Amount that he has
= Cost of 4 stickers + 11
= 4 x 3 + 11
= 12 + 11
= $23
Answer(s): (a) $3; (b) $23