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 P5 Maths 2011 SA2 CHIJ St Nicholas Paper 2 Q13
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By: geniuskids (offline)  Sunday, October 14 2012 @ 11:48 AM CDT (Read 966 times)  
geniuskids

Q13 : Allan and Jackie received a fixed weekly allowance from their parents. Allan received $4 more than Jackie as weekly allowance.
Each of their weekly expenditure was $28 and they saved the rest. When Allan had saved $80, Jackie only saved $40.
Both of them took the same number of weeks to save this amount. What was the total weekly allowance that both of them received?


Many thanks

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By: echeewh (offline)  Wednesday, October 17 2012 @ 06:47 PM CDT  
echeewh

Hey there,

Following pls find my worked solution:

Q13.

Apply <Unchanged Difference> concept (since both A,J weekly expenditure were same), difference between A, J weekly allowance and A, J weekly savings are same.

i.e. A - J (weekly allowance) = $4 = A - J (weekly savings)

Given difference in savings (A - J) = 80 - 40 = 40,
total number of weeks = 40 ÷ 4 = 10

Weekly Savings (A) = 80 ÷ 10 = 8
Weekly Savings (J) = 40 ÷ 10 = 4

Total Weekly Savings (A + J) = 12
Total Weekly Allowance (A + J) = Total Weekly Savings + Total Weekly Expenditure
= 12 + 56
= $68

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

Trust this helps.

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

Cheers,
Edward

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