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, February 27, 2012

Rosyth School 2011 CA1 Math Paper 2 Q17

Farmer Dan harvested some apples. He sold to Adam 3/4 of the apples and another 105 apples. He sold to Geraldine 3/4 of the remainder but took back 55 apples. Farmer Dan had 890 apples left.

a) How many apples did Geraldine have after returning 55 apples to Farmer Dan?

b) How many apples did Farmer Dan harvest?

Solution

1/4 of remaining ----- 890 – 55 = 835

3/4 of remaining ----- 3 x 835 = 2505


a) Geraldine ----- 2505 - 55 = 2450


b) 1 unit ----- 4/4 of remaining + 105

4/4 of remaining ----- 835 x 4 = 3340

1 unit ----- 3340 + 105 = 3445

(Total harvested) 4 units ----- 4 x 3445 = 13 780


Answer: a) 2450 apples b) 13 780 apples.