Mrs Lu baked some shortbreads of three flavours, which were strawberry, blueberry and vanilla. She baked twice as many strawberry shortbreads as blueberry shortbreads and thrice as many vanilla shortbreads as strawberry shortbread. Given that she baked 80 more vanilla shortbreads than blueberry shortbreads, how many shortbreads did she bake?
Number of blueberry shortbreads = 1 u
Number of strawberry shortbreads = 2 u
Number of vanilla shortbreads = 3 x 2 u = 6 u

Number of more vanilla shortbreads than blueberry shortbreads
= 6 u - 1 u 
= 5 u

5 u = 80

1 u = 80 ÷ 5 = 16

Number of strawberry shortbreads
= 2 u
= 2 x 16
= 32

Number of vanilla shortbreads
= 6 u
= 6 x 16
= 96

Total number of shortbreads that he baked
= 16 + 32 + 96
= 144

Answer(s): 144