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Friday, November 24 2017 @ 10:44 AM CST
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 P5 Maths
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By: Super (offline)  Thursday, January 20 2011 @ 10:01 AM CST (Read 1727 times)  
Super

Hi,

I need help on this maths question. Hope that someone can assist me. Thanks in advance.

Tom and Jerry each has some money. If Tom spends $90 per day and Jerry spends $45 per day. Tom will have $1100 left when Jerry has spent all his money. If Tom spends $45 each day and Jerry spends $90 each day, Tom will have $1700 left when Jerry has spent all his money. How much did Jerry have?

Thanks again.

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By: suz855 (offline)  Sunday, January 23 2011 @ 08:50 AM CST  
suz855

case 1 (Tom spent twice as much as Jerry)

Tom Jerry Tom 1100 left
2 1
x2
4 2

Case 2 (Jerry spent twice as much as Tom)

Tom Jerry Tom (1700 left)
1 2

In both cases Jerry spends all his money therefore his units should be the same.

4u + 1100 = 1 u + 1700
3u = 600
1u = 200

therefore Jerry had 2 x 200 = $400 at first

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