PSLEThere are some stickers in albums N and P. 50% of the stickers in album N and 10% of the stickers in album P are square stickers. There is an equal number of round stickers in both albums. If there are 80 more square stickers in album N than in album P, how many stickers are there in both albums altogether?
N |
P |
Square |
Round |
Square |
Round |
1x9 |
1x9 |
1 |
9 |
9 u |
9 u |
1 u |
9 u |
10% =
10100 =
11050% =
50100 =
12The number of round stickers in both albums is the same. Make the number of round stickers the same. LCM of 1 and 9 is 9.
Number of more square stickers in Album N than Album P
= 9 u - 1 u
= 8 u
8 u = 80
1 u = 80 ÷ 8 = 10
Number of stickers in both albums
= 9 u + 9 u + 1 u + 9 u
= 28 u
= 28 x 10
= 280
Answer(s): 280