PSLE
A fruit stall sold mangosteens at 70¢ and limes at 40¢ each. Marion bought some mangosteens and Elyse bought some limes from the stall. Elyse spent $0.50 less than Marion, but had 4 fruits more than Marion.

1. How many limes did Elyse buy?
2. How much did Marion spend on the mangosteens?

	Mangosteens	Limes
Number	1 u	1 u + 4
Value	0.7	0.4
Total value	0.7 u	0.4 u + 1.6

(a)
Number of mangosteens that Marion bought = 1 u
Number of limes that Elyse bought = 1 u + 4

Amount that Marion paid = 0.7 x 1 u = 0.7 u
Amount that Elyse paid = 0.4(1 u + 4) = 0.4 u + 1.6

If Elyse spent another $0.50, both Elyse and Marion would spend the same amount.

0.7 u = 0.4 u + 1.6 + 0.5
0.7 u - 0.4 u = 1.6 + 0.5
0.3 u = 2.1

1 u = 2.1 ÷ 0.3 = 7

Number of limes that Elyse bought
= 1 u + 4
= 7 + 4
= 11

(b)
Amount that Marion spent on the mangosteens
= 0.7 u 
= 0.7 x 7 
= $4.90

Answer(s): (a) 7; (b) $4.90