Adam has some money to buy some stickers.
If he buys 6 stickers, he will have $15 left.
If he buys 13 stickers, he will need $6 more.
- How much does each sticker cost?
- How much money does he have?
(a)
Difference in the number of stickers in both scenarios
= 13 - 6
= 7
To buy 7 stickers, he needs to use $15 that is left and get an extra of $6.
Difference in the amount to pay in both scenarios
= 15 + 6
= $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 6 stickers + 15
= 6 x 3 + 15
= 18 + 15
= $33
Answer(s): (a) $3; (b) $33