Betty had some apple and kiwi face masks.
16 of them were apple. She gave away
13 of the apple face masks and
13 of the kiwi face masks. In the end, she had 60 apple and kiwi face masks altogether. How many kiwi face masks did Betty have at first?
| |
Apple face masks |
Kiwi face masks |
Total |
Comparing apple and kiwi face masks
at first |
1x3 =
3 u |
5x3 =
15 u |
6x3 =
18 u |
Before |
3 u |
3x5 =
15 u |
|
Change |
- 1 u |
- 1x5 =
- 5 u |
|
After |
2 u |
2x5 =
10 u |
|
The number of kiwi face masks at first is repeated. Make the number of kiwi face masks the same. LCM of 5 and 3 is 15.
Total number of face masks in the end
= 2 u + 10 u
= 12 u
12 u = 60
1 u = 60 ÷ 12 = 5
Number of kiwi masks at first
= 15 u
= 15 x 5
= 75
Answer(s): 75
