Abi had some lemon and orange face masks.
16 of them were lemon. She gave away
14 of the lemon face masks and
14 of the orange face masks. In the end, she had 252 lemon and orange face masks altogether. How many orange face masks did Abi have at first?
| |
Lemon face masks |
Orange face masks |
Total |
Comparing lemon and orange 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 orange face masks at first is repeated. Make the number of orange 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 = 252
1 u = 252 ÷ 18 = 14
Number of orange masks at first
= 20 u
= 20 x 14
= 280
Answer(s): 280
