Xylia had some mango and kiwi face masks.
16 of them were mango. She gave away
14 of the mango face masks and
14 of the kiwi face masks. In the end, she had 90 mango and kiwi face masks altogether. How many kiwi face masks did Xylia have at first?
| |
Mango face masks |
Kiwi face masks |
Total |
Comparing mango and kiwi face masks
at first |
1x4 =
4 u |
5x4 =
20 u |
6x4 =
24 u |
Before |
4 u |
4x5 =
20 u |
|
Change |
- 1 u |
- 1x5 =
- 5 u |
|
After |
3 u |
3x5 =
15 u |
|
The number of kiwi face masks at first is repeated. Make the number of kiwi face masks the same. LCM of 5 and 4 is 20.
Total number of face masks in the end
= 3 u + 15 u
= 18 u
18 u = 90
1 u = 90 ÷ 18 = 5
Number of kiwi masks at first
= 20 u
= 20 x 5
= 100
Answer(s): 100
