Risa bought some eggs to bake cakes for a party. If she used 4 eggs for each cake, she would be short of 8 more eggs to bake all cakes. If she used 7 eggs for each cake, she would be short of 47 more eggs.
- How many cakes did she bake?
- How many eggs did Risa buy?
(a)
Small difference
= 7 - 4
= 3
Big difference
= 47 - 8
= 39
Number of cakes that Risa bought
= 39 ÷ 3
= 13
(b)
Number of eggs that Risa bought
= 13 x 4 - 8
= 52 - 8
= 44
Answer(s): (a) 13; (b) 44