SG
chevron_right
Primary 5
chevron_right
Number and Algebra
Please help with this. Thank you
Replies
12
Regina Lim
The answer is 100
6 years ago
Xavier Sng
Initial
Mike had 5 units + 60
Since the ratio of Keith to Mike is 2 : 5
Keith had 2 units + 24
Final
Mike had 5 units
Keith had 2 units + 24 + 40
= 2 units + 64
= 2 (1 unit + 32)
Since the final ratio is 2:1
Mike would end up with 1 unit + 32
5 units = 1 unit + 32
1 unit = 8
5 units + 60 = 100
6 years ago
Wahidah Khan
confused
6 years ago
Wahidah Khan
i dont understand Xavier Sng
6 years ago
Wahidah Khan
6 years ago
Wahidah Khan
i did it this way. hope it helps
6 years ago
Xavier Sng
Hello Wahidah Khan. Your method is perfectly acceptable. The way I did mine is to remove elements like " 5 units - 60 " which primary school students may not be taught to equate in school. So I tweaked the model a little to remove that.
6 years ago
Wahidah Khan
oh ok. thk u Xavier Sng
6 years ago
Xavier Sng
The pleasure is mine. Thank you for sharing your solution with us!
6 years ago
Wahidah Khan
pleasure is all mine too
6 years ago
Regina Lim
sorry for the late reply. Thank you all for sharing the solutions.
6 years ago
Xavier Sng
Please don't mention it. We are all here to share.
6 years ago
W.H. Lim
Asked 9 years ago
SG
chevron_right
Primary 6
chevron_right
Number and Algebra
Anyone...?I'm totally confused by the sample solution too.