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.

## Friday, February 01, 2008

### Tao Nan School P6 Math CA1 2004 (Q40)

Mrs Ang bought 44 cakes. The ratio of the number of butter cakes to the number of chocolate cakes was 6 : 5. After giving some chocolate cakes to her neighbours, Mrs Ang had twice as many butter cakes as chocolate cakes. How many chocolate cakes did she give away?

Solution

After giving away some cakes, she had twice as many butter cakes as chocolate cakes.

Since no butter cakes were given, the number of units of butter cakes remains as 6.

* Half of 6 units will give 3 units of chocolate cakes left, after some of them have been given away.

This means that 2 units of chocolate cakes have been given away.

1 unit ----- 4 cakes

2 units ----- 8 cakes

Answer: She gave away 8 chocolate cakes.
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