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.

Monday, December 10, 2007

Tao Nan School P5 SA2 2006 Math Question (Q48)

At an exhibition, 30% of those present were boys. 5/14 of the remainder were girls and the rest were adults. There were 45 more adults than boys. How many more children than adults were there at the exhibition?

Boys ----- 30%

Girls ----- 5/14 of remainder

= 5/14 x 70% = 25%

Total children ----- 30% (boys) + 25% (girls) = 55%


Adults ----- 100% - 55% (children) = 45%

There were 45 more adults than boys, therefore,

45% (adults) – 30% (boys) ----- 45 people

15% ----- 45 people

1% ----- (45 people) divided by 15 = 3 people


Children more than adults -----

55% (total children) – 45% (adults) = 10%

10% ----- (3 people) x 10 = 30 people


Answer: There were 30 more adults than children.

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