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TOPIC: P5 Constant Difference

P5 Constant Difference 6 years 10 months ago #1

  • Xiao Hei
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Hi,

I have this maths question that need help to solve.

Question:
The ratio of the age of Mike and Paul is 2:11. 4 years later, the ratio of the age of Mike to Paul is 5:23. How old is Mike now?

Hope there is someone to help solving this question, with workings indicated. Thank you.
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Re:Pri 5 - Maths Ratio 6 years 10 months ago #2

  • Chris Rogers
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The ratio of the age of Mike and Paul is 2:11. 4 years later, the ratio of the age of Mike to Paul is 5:23. How old is Mike now?

Constant Difference
Now
M : P
2 : 11 (Diff 9units)
4 : 22 (Diff 18units)

4 Years Later
M : P
5 : 23 (Diff 18units)

1unit --> 4 years
Mike now is 4units --> 4 x 4years = 16 years
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Re:P5 Constant Difference 6 years 10 months ago #3

  • Xiao Hei
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Hi Chris Roger,

Thanks for your help in solving this question.
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