Cindy spent $252 to buy some boxes of cranberry and blueberry macarons. Each box of cranberry macarons cost $6 and each box of blueberry macarons cost $9. The cranberry macarons were packed in boxes of 12 macarons each and the blueberry macarons were packed in boxes of 10 macarons each. She bought an equal number of cranberry macarons and blueberry macarons.
(a) How many boxes of cranberry macarons did she buy?
(b) How many boxes of blueberry macarons did she buy?
(a)
Total number of cranberry macarons and blueberry macarons is the same.

LCM of 12 and 10 = 60

Number of boxes for 60 cranberry macarons
= 60 ÷ 12
= 5

Number of boxes for 60 blueberry macarons
= 60 ÷ 10
= 6

1 set = 5 boxes of cranberry macarons and 6 boxes of blueberry macarons

Cost of 1 set
= 5 x 6 + 6 x 9
= 30 + 54
= $84

Number of sets
= 252 ÷ 84
= 3

Boxes of cranberry macarons
= 3 x 5
= 15

(b)
Boxes of blueberry macarons
= 3 x 6
= 18

Answer(s): (a) 15; (b) 18