This blog is managed by Song Hock Chye, author of Improve Your Thinking Skills in Maths (P1-P3 series), which is published and distributed by EPH.

Wednesday, December 05, 2007

Tao Nan School P5 SA2 2006 Math Question (Q46)

Cherie had 3 times as much money as Jolene. After Cherie spent $40.00 and Jolene spent $8.00, Jolene had 3 times as much money as Cherie. How much money did Cherie have at first?

Solution





Cherie before spending

9 units + $8 +$8 +$8

= 9 units + $24


Cherie after spending ---- 1 unit

Cherie spent $40, therefore,

Amount she had before spending – Amount she had after spending ----- $40

(9 units + $24) – 1 unit ----- $40

8 units + $24 ----- $40

8 units ----- $40 - $24 = $16

1 unit ----- $16 divided by 8 = $2


Amount of money Cherie had at first

9 units + $24

= (9 x $2) + $24

= $18 + $24

= $42

Answer: Cherie had $42 at first.

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