PSLEThere are some stickers in albums E and F. 50% of the stickers in album E and 10% of the stickers in album F are square stickers. There is an equal number of oval stickers in both albums. If there are 120 more square stickers in album E than in album F, how many stickers are there in both albums altogether?
E |
F |
Square |
Oval |
Square |
Oval |
1x9 |
1x9 |
1 |
9 |
9 u |
9 u |
1 u |
9 u |
10% =
10100 =
11050% =
50100 =
12The number of oval stickers in both albums is the same. Make the number of oval stickers the same. LCM of 1 and 9 is 9.
Number of more square stickers in Album E than Album F
= 9 u - 1 u
= 8 u
8 u = 120
1 u = 120 ÷ 8 = 15
Number of stickers in both albums
= 9 u + 9 u + 1 u + 9 u
= 28 u
= 28 x 15
= 420
Answer(s): 420