Mrs Fred baked
13 as many cranberry biscuits as apple biscuits. She also baked
27 as many cranberry biscuits as chocolate chip biscuits. If she baked a total of 60 biscuits, how many cranberry biscuits did she bake?
Cranberry |
Apple |
Chocolate Chip |
1x2 |
3x2 |
|
2x1 |
|
7x1 |
2 u |
6 u |
7 u |
The number of cranberry biscuits is the repeated identity. Make the number of cranberry biscuits the same. LCM of 1 and 2 is 2.
Total number of biscuits
= 2 u + 6 u + 7 u
= 15 u
15 u = 60
1 u = 60 ÷ 15 = 4
Number of cranberry biscuits
= 2 u
= 2 x 4
= 8
Answer(s): 8