PSLEThere are some stickers in albums Q and R. 50% of the stickers in album Q and 20% of the stickers in album R are round stickers. There is an equal number of oval stickers in both albums. If there are 72 more round stickers in album Q than in album R, how many stickers are there in both albums altogether?
Q |
R |
Round |
Oval |
Round |
Oval |
1x4 |
1x4 |
1 |
4 |
4 u |
4 u |
1 u |
4 u |
20% =
20100 =
1550% =
50100 =
12The number of oval stickers in both albums is the same. Make the number of oval stickers the same. LCM of 1 and 4 is 4.
Number of more round stickers in Album Q than Album R
= 4 u - 1 u
= 3 u
3 u = 72
1 u = 72 ÷ 3 = 24
Number of stickers in both albums
= 4 u + 4 u + 1 u + 4 u
= 13 u
= 13 x 24
= 312
Answer(s): 312