Mrs Tang baked some wafers of three flavours, which were strawberry, apricot and cranberry. She baked twice as many strawberry wafers as apricot wafers and twice as many cranberry wafers as strawberry wafer. Given that she baked 66 more cranberry wafers than apricot wafers, how many wafers did she bake?
Number of apricot wafers = 1 u
Number of strawberry wafers = 2 u
Number of cranberry wafers = 2 x 2 u = 4 u

Number of more cranberry wafers than apricot wafers
= 4 u - 1 u 
= 3 u

3 u = 66

1 u = 66 ÷ 3 = 22

Number of strawberry wafers
= 2 u
= 2 x 22
= 44

Number of cranberry wafers
= 4 u
= 4 x 22
= 88

Total number of wafers that he baked
= 22 + 44 + 88
= 154

Answer(s): 154