PSLEThere are some stickers in albums M and N. 75% of the stickers in album M and 25% of the stickers in album N are round stickers. There is an equal number of square stickers in both albums. If there are 40 more round stickers in album M than in album N, how many stickers are there in both albums altogether?
M |
N |
Round |
Square |
Round |
Square |
3x3 |
1x3 |
1 |
3 |
9 u |
3 u |
1 u |
3 u |
25% =
25100 =
1475% =
75100 =
34The number of square stickers in both albums is the same. Make the number of square stickers the same. LCM of 1 and 3 is 3.
Number of more round stickers in Album M than Album N
= 9 u - 1 u
= 8 u
8 u = 40
1 u = 40 ÷ 8 = 5
Number of stickers in both albums
= 9 u + 3 u + 1 u + 3 u
= 16 u
= 16 x 5
= 80
Answer(s): 80