PSLE
A fruit stall sold mangosteens at 80¢ and pears at 50¢ each. Zara bought some mangosteens and Gabby bought some pears from the stall. Gabby spent $0.60 less than Zara, but had 3 fruits more than Zara.

1. How many pears did Gabby buy?
2. How much did Zara spend on the mangosteens?

	Mangosteens	Pears
Number	1 u	1 u + 3
Value	0.8	0.5
Total value	0.8 u	0.5 u + 1.5

(a)
Number of mangosteens that Zara bought = 1 u
Number of pears that Gabby bought = 1 u + 3

Amount that Zara paid = 0.8 x 1 u = 0.8 u
Amount that Gabby paid = 0.5(1 u + 3) = 0.5 u + 1.5

If Gabby spent another $0.60, both Gabby and Zara would spend the same amount.

0.8 u = 0.5 u + 1.5 + 0.6
0.8 u - 0.5 u = 1.5 + 0.6
0.3 u = 2.1

1 u = 2.1 ÷ 0.3 = 7

Number of pears that Gabby bought
= 1 u + 3
= 7 + 3
= 10

(b)
Amount that Zara spent on the mangosteens
= 0.8 u 
= 0.8 x 7 
= $5.60

Answer(s): (a) 7; (b) $5.60