PSLEThere are some stickers in albums S and T. 90% of the stickers in album S and 20% of the stickers in album T are square stickers. There is an equal number of oval stickers in both albums. If there are 105 more square stickers in album S than in album T, how many stickers are there in both albums altogether?
S |
T |
Square |
Oval |
Square |
Oval |
9x4 |
1x4 |
1 |
4 |
36 u |
4 u |
1 u |
4 u |
20% =
20100 =
1590% =
90100 =
910The 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 S than Album T
= 36 u - 1 u
= 35 u
35 u = 105
1 u = 105 ÷ 35 = 3
Number of stickers in both albums
= 36 u + 4 u + 1 u + 4 u
= 45 u
= 45 x 3
= 135
Answer(s): 135