Mrs Ahmad baked
13 as many vanilla cookies as apricot cookies. She also baked
27 as many vanilla cookies as banana cookies. If she baked a total of 120 cookies, how many vanilla cookies did she bake?
Vanilla |
Apricot |
Banana |
1x2 |
3x2 |
|
2x1 |
|
7x1 |
2 u |
6 u |
7 u |
The number of vanilla cookies is the repeated identity. Make the number of vanilla cookies the same. LCM of 1 and 2 is 2.
Total number of cookies
= 2 u + 6 u + 7 u
= 15 u
15 u = 120
1 u = 120 ÷ 15 = 8
Number of vanilla cookies
= 2 u
= 2 x 8
= 16
Answer(s): 16