Irene had some kiwi and passion fruit face masks.
13 of them were kiwi. She gave away
15 of the kiwi face masks and
15 of the passion fruit face masks. In the end, she had 144 kiwi and passion fruit face masks altogether. How many passion fruit face masks did Irene have at first?
| |
Kiwi face masks |
Passion Fruit face masks |
Total |
Comparing kiwi and passion fruit face masks
at first |
1x5 =
5 u |
2x5 =
10 u |
3x5 =
15 u |
Before |
5 u |
5x2 =
10 u |
|
Change |
- 1 u |
- 1x2 =
- 2 u |
|
After |
4 u |
4x2 =
8 u |
|
The number of passion fruit face masks at first is repeated. Make the number of passion fruit face masks the same. LCM of 2 and 5 is 10.
Total number of face masks in the end
= 4 u + 8 u
= 12 u
12 u = 144
1 u = 144 ÷ 12 = 12
Number of passion fruit masks at first
= 10 u
= 10 x 12
= 120
Answer(s): 120
