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 P5 Mathematics Rosyths CA1 2011
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By: Kim Won Jun (offline)  Monday, November 12 2012 @ 07:11 AM CST (Read 853 times)  
Kim Won Jun

Qn 9. Kassim has 3 times as many stamps as Peiling. Leonard has 82 stamps more than Peiling. Kassim then sold 106 of his stamps and Leonard bought another 50 stamps. Kassim and Leonard had an equal number of stamps in the end. How many stamps did the three of them have altogether in the end?

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By: echeewh (offline)  Monday, November 12 2012 @ 09:52 PM CST  
echeewh

Hey Kim,

Following pls find my worked solution:

*** - for alignment purpose


<Bef>

*********** <-------- 2u ------>
K |----------|----------|----------|
P |----------|
L |----------<82>|

<aft>

********************** <106->
K |----------|-------------|
P |----------|
L |----------<82><50>|


(a) K - P (at end) = 82 + 50 = 132

(b)
Comparing <bef> and <aft> models:

2u --> 82 + 50 + 106 = 238
1u --> 119

K+P+L (at end) = 3u + 132 + 132 = 3u + 264
--> (3 × 119) + 264 = 357 + 264
= 621

=====================

Trust this helps.

Do let me know again if there's further clarification.

Cheers,
Edward

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