Tammy had some kiwi and lemon face masks.
15 of them were kiwi. She gave away
13 of the kiwi face masks and
13 of the lemon face masks. In the end, she had 40 kiwi and lemon face masks altogether. How many lemon face masks did Tammy have at first?
| |
Kiwi face masks |
Lemon face masks |
Total |
Comparing kiwi and lemon face masks
at first |
1x3 =
3 u |
4x3 =
12 u |
5x3 =
15 u |
Before |
3 u |
3x4 =
12 u |
|
Change |
- 1 u |
- 1x4 =
- 4 u |
|
After |
2 u |
2x4 =
8 u |
|
The number of lemon face masks at first is repeated. Make the number of lemon face masks the same. LCM of 4 and 3 is 12.
Total number of face masks in the end
= 2 u + 8 u
= 10 u
10 u = 40
1 u = 40 ÷ 10 = 4
Number of lemon masks at first
= 12 u
= 12 x 4
= 48
Answer(s): 48
