PSLEThere are some stickers in albums X and Y. 80% of the stickers in album X and 25% of the stickers in album Y are oval stickers. There is an equal number of round stickers in both albums. If there are 121 more oval stickers in album X than in album Y, how many stickers are there in both albums altogether?
X |
Y |
Oval |
Round |
Oval |
Round |
4x3 |
1x3 |
1 |
3 |
12 u |
3 u |
1 u |
3 u |
25% =
25100 =
1480% =
80100 =
45The number of round stickers in both albums is the same. Make the number of round stickers the same. LCM of 1 and 3 is 3.
Number of more oval stickers in Album X than Album Y
= 12 u - 1 u
= 11 u
11 u = 121
1 u = 121 ÷ 11 = 11
Number of stickers in both albums
= 12 u + 3 u + 1 u + 3 u
= 19 u
= 19 x 11
= 209
Answer(s): 209