Tina had some pear and mangosteen face masks.
16 of them were pear. She gave away
13 of the pear face masks and
13 of the mangosteen face masks. In the end, she had 132 pear and mangosteen face masks altogether. How many mangosteen face masks did Tina have at first?
| |
Pear face masks |
Mangosteen face masks |
Total |
Comparing pear and mangosteen 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 mangosteen face masks at first is repeated. Make the number of mangosteen 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 = 132
1 u = 132 ÷ 12 = 11
Number of mangosteen masks at first
= 15 u
= 15 x 11
= 165
Answer(s): 165
