PSLEThere are some stickers in albums W and X. 90% of the stickers in album W and 20% of the stickers in album X are oval stickers. There is an equal number of round stickers in both albums. If there are 735 more oval stickers in album W than in album X, how many stickers are there in both albums altogether?
W |
X |
Oval |
Round |
Oval |
Round |
9x4 |
1x4 |
1 |
4 |
36 u |
4 u |
1 u |
4 u |
20% =
20100 =
1590% =
90100 =
910The number of round stickers in both albums is the same. Make the number of round stickers the same. LCM of 1 and 4 is 4.
Number of more oval stickers in Album W than Album X
= 36 u - 1 u
= 35 u
35 u = 735
1 u = 735 ÷ 35 = 21
Number of stickers in both albums
= 36 u + 4 u + 1 u + 4 u
= 45 u
= 45 x 21
= 945
Answer(s): 945