The table shows the prices of wafers at two shops. The wafers are only sold in sets of 8 wafers in Min's Bakery or sets of 9 wafers in Eva's Bakery.
Shop |
Price of wafers |
Min's Bakery |
8 for $13 |
Eva's Bakery |
9 for $15 |
- Fanny has $25.60. She wants to buy 45 wafers from Eva's Bakery. How much more money does she need to buy the 45 wafers?
- Riordan has $54. He wants to buy the greatest possible number of wafers with his money from one of the two shops. What is the greatest possible number of wafers he can buy with his money?
(a)
Number of sets of 9 wafers
= 45 ÷ 9
= 5
Cost of 45 wafers
= 5 x 15
= $75
Amount that Fanny needs more to buy the 45 wafers
= 75 - 25.60
= $49.40
(b)
Number of sets of 8 wafers that Riordan could buy at Min's Bakery
= 54 ÷ 13
= 4 r 2
Number of wafers that Riordan could buy at Min's Bakery
= 4 x 8
= 32
(More)Number of sets of 9 wafers that Riordan could buy at Eva's Bakery
= 54 ÷ 15
= 3 r 9
Number of wafers that Riordan could buy at Eva's Bakery
= 3 x 9
= 27
Greatest possible number of wafers that Riordan can buy with his money = 32
Answer(s): (a) $49.40; (b) 32