Gillian had some orange and kiwi face masks.
13 of them were orange. She gave away
13 of the orange face masks and
16 of the kiwi face masks. In the end, she had 70 orange and kiwi face masks altogether. How many kiwi face masks did Gillian have at first?
| |
Orange face masks |
Kiwi face masks |
Total |
Comparing orange and kiwi face masks
at first |
1x3 =
3 u |
2x3 =
6 u |
3x3 =
9 u |
Before |
3 u |
6x1 =
6 u |
|
Change |
- 1 u |
- 1x1 =
- 1 u |
|
After |
2 u |
5x1 =
5 u |
|
The number of kiwi face masks at first is repeated. Make the number of kiwi face masks the same. LCM of 2 and 6 is 6.
Total number of face masks in the end
= 2 u + 5 u
= 7 u
7 u = 70
1 u = 70 ÷ 7 = 10
Number of kiwi masks at first
= 6 u
= 6 x 10
= 60
Answer(s): 60
