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, November 30, 2007

Catholic High School P5 CA1 2004 Math Question

Mr Tan had thrice as many apples as pears at his stall at first. After he sold 129 apples and threw away 8 rotten pears, he had only half as many apples as pears left. How many pears did he have left?


Before -



After – Threw 8 pears, sold 129 apples, left with half as many apples as pears.




Apples sold

5 units + 8 + 8 + 8 ----- 129

5 units + 24 ----- 129

5 units ----- 129 –24

5 units ----- 105

1 unit ----- 105 divided by 5 = 21


Pears left

2 units ----- 21 x 2 = 42


Answer: He had 24 pears left.

1 comment:

Anonymous said...

42 or 24?????