PSLEThere are some stickers in albums V and W. 50% of the stickers in album V and 10% of the stickers in album W are oval stickers. There is an equal number of round stickers in both albums. If there are 72 more oval stickers in album V than in album W, how many stickers are there in both albums altogether?
V |
W |
Oval |
Round |
Oval |
Round |
1x9 |
1x9 |
1 |
9 |
9 u |
9 u |
1 u |
9 u |
10% =
10100 =
11050% =
50100 =
12The number of round stickers in both albums is the same. Make the number of round stickers the same. LCM of 1 and 9 is 9.
Number of more oval stickers in Album V than Album W
= 9 u - 1 u
= 8 u
8 u = 72
1 u = 72 ÷ 8 = 9
Number of stickers in both albums
= 9 u + 9 u + 1 u + 9 u
= 28 u
= 28 x 9
= 252
Answer(s): 252