Here is the answers to Section 1
of the Test. The numbers in bracket is the marks allocated for that part of working.Question 1
x = 100 / 15 x 45
= 300 (1/2)
y = 25 / 12 x 96
= 200 (1/2)
x : y = 200 : 300
= 2 : 3 (1)
Question 2
Original Price of the Washing Machine = 100 / 85 x $718.25
= $845 (1)
Question 3
(a) Ratio of the areas of the 2 circles = 
: 
=
9 : 25
(b) Ratio of the areas of the 2 circles = (
x 3)
: ( 
x 5)
=
4.5 : 15
=
1.5 : 5
=
3 : 10
=
9 : 100
Question 4
Let $y = the price Mr. Leong paid for the painting
Leong to Wei = 115% x y = 1.15y (1/2)
Wei to Chua = 90% x 1.15y = 1.035y (1/2)
Chua to Gan = 95% x 1.15y = 1.0925y (1/2)
Mr. Gan bought the painting at $1.0925y. (1/2)
1.0925y > y (1/2)
Therefore,
Mr. Gan bought the painting at a higher price than Mr. Leong did. (1/2)
