Dana bought some eggs to bake cakes for a party. If she used 7 eggs for each cake, she would be short of 3 more eggs to bake all cakes. If she used 12 eggs for each cake, she would be short of 33 more eggs.
- How many cakes did she bake?
- How many eggs did Dana buy?
(a)
Small difference
= 12 - 7
= 5
Big difference
= 33 - 3
= 30
Number of cakes that Dana bought
= 30 ÷ 5
= 6
(b)
Number of eggs that Dana bought
= 6 x 7 - 3
= 42 - 3
= 39
Answer(s): (a) 6; (b) 39