PSLEThere are some stickers in albums T and U. 80% of the stickers in album T and 20% of the stickers in album U are square stickers. There is an equal number of round stickers in both albums. If there are 90 more square stickers in album T than in album U, how many stickers are there in both albums altogether?
T |
U |
Square |
Round |
Square |
Round |
4x4 |
1x4 |
1 |
4 |
16 u |
4 u |
1 u |
4 u |
20% =
20100 =
1580% =
80100 =
45The 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 square stickers in Album T than Album U
= 16 u - 1 u
= 15 u
15 u = 90
1 u = 90 ÷ 15 = 6
Number of stickers in both albums
= 16 u + 4 u + 1 u + 4 u
= 25 u
= 25 x 6
= 150
Answer(s): 150