Mrs Leow baked some muffins of three flavours, which were banana, blueberry and cherry. She baked twice as many banana muffins as blueberry muffins and thrice as many cherry muffins as banana muffin. Given that she baked 100 more cherry muffins than blueberry muffins, how many muffins did she bake?
Number of blueberry muffins = 1 u
Number of banana muffins = 2 u
Number of cherry muffins = 3 x 2 u = 6 u

Number of more cherry muffins than blueberry muffins
= 6 u - 1 u 
= 5 u

5 u = 100

1 u = 100 ÷ 5 = 20

Number of banana muffins
= 2 u
= 2 x 20
= 40

Number of cherry muffins
= 6 u
= 6 x 20
= 120

Total number of muffins that he baked
= 20 + 40 + 120
= 180

Answer(s): 180