PSLEThere are some stickers in albums M and N. 80% of the stickers in album M and 20% of the stickers in album N are oval stickers. There is an equal number of square stickers in both albums. If there are 225 more oval stickers in album M than in album N, how many stickers are there in both albums altogether?
M |
N |
Oval |
Square |
Oval |
Square |
4x4 |
1x4 |
1 |
4 |
16 u |
4 u |
1 u |
4 u |
20% =
20100 =
1580% =
80100 =
45The number of square stickers in both albums is the same. Make the number of square stickers the same. LCM of 1 and 4 is 4.
Number of more oval stickers in Album M than Album N
= 16 u - 1 u
= 15 u
15 u = 225
1 u = 225 ÷ 15 = 15
Number of stickers in both albums
= 16 u + 4 u + 1 u + 4 u
= 25 u
= 25 x 15
= 375
Answer(s): 375