PSLEThere are some stickers in albums H and J. 50% of the stickers in album H and 20% of the stickers in album J are square stickers. There is an equal number of oval stickers in both albums. If there are 9 more square stickers in album H than in album J, how many stickers are there in both albums altogether?
H |
J |
Square |
Oval |
Square |
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 square stickers in Album H than Album J
= 4 u - 1 u
= 3 u
3 u = 9
1 u = 9 ÷ 3 = 3
Number of stickers in both albums
= 4 u + 4 u + 1 u + 4 u
= 13 u
= 13 x 3
= 39
Answer(s): 39