Cindy had some mangosteen and kiwi face masks.
14 of them were mangosteen. She gave away
15 of the mangosteen face masks and
15 of the kiwi face masks. In the end, she had 224 mangosteen and kiwi face masks altogether. How many kiwi face masks did Cindy have at first?
| |
Mangosteen face masks |
Kiwi face masks |
Total |
Comparing mangosteen and kiwi face masks
at first |
1x5 =
5 u |
3x5 =
15 u |
4x5 =
20 u |
Before |
5 u |
5x3 =
15 u |
|
Change |
- 1 u |
- 1x3 =
- 3 u |
|
After |
4 u |
4x3 =
12 u |
|
The number of kiwi face masks at first is repeated. Make the number of kiwi face masks the same. LCM of 3 and 5 is 15.
Total number of face masks in the end
= 4 u + 12 u
= 16 u
16 u = 224
1 u = 224 ÷ 16 = 14
Number of kiwi masks at first
= 15 u
= 15 x 14
= 210
Answer(s): 210
