PSLEThere are some stickers in albums M and N. 90% of the stickers in album M and 25% of the stickers in album N are round stickers. There is an equal number of oval stickers in both albums. If there are 260 more round stickers in album M than in album N, how many stickers are there in both albums altogether?
M |
N |
Round |
Oval |
Round |
Oval |
9x3 |
1x3 |
1 |
3 |
27 u |
3 u |
1 u |
3 u |
25% =
25100 =
1490% =
90100 =
910The number of oval stickers in both albums is the same. Make the number of oval stickers the same. LCM of 1 and 3 is 3.
Number of more round stickers in Album M than Album N
= 27 u - 1 u
= 26 u
26 u = 260
1 u = 260 ÷ 26 = 10
Number of stickers in both albums
= 27 u + 3 u + 1 u + 3 u
= 34 u
= 34 x 10
= 340
Answer(s): 340