The table shows the prices of croissants at two shops. The croissants are only sold in sets of 6 croissants in Eva's Bakery or sets of 7 croissants in Yen's Bakery.

Shop	Price of croissants
Eva's Bakery	6 for $14
Yen's Bakery	7 for $15

1. Gwen has $42.90. She wants to buy 21 croissants from Yen's Bakery. How much more money does she need to buy the 21 croissants?
2. Fred has $53. He wants to buy the greatest possible number of croissants with his money from one of the two shops. What is the greatest possible number of croissants he can buy with his money?

(a)
Number of sets of 7 croissants
= 21 ÷ 7
= 3

Cost of 21 croissants 
= 3 x 15
= $45

Amount that Gwen needs more to buy the 21 croissants
= 45 - 42.90
= $2.10

(b)
Number of sets of 6 croissants that Fred could buy at Eva's Bakery
= 53 ÷ 14
= 3 r 11

Number of croissants that Fred could buy at Eva's Bakery
= 3 x 6
= 18 

Number of sets of 7 croissants that Fred could buy at Yen's Bakery
= 53 ÷ 15
= 3 r 8

Number of croissants that Fred could buy at Yen's Bakery
= 3 x 7
= 21 (More)

Greatest possible number of croissants that Fred can buy with his money = 21

Answer(s): (a) $2.10; (b) 21