PSLE
Stationery Kiosks F and G sell files of four colours. The bar graphs show the number of files sold by each shop in April. The bar for the number purple files sold by Stationery Kiosk F has not been drawn.

1. Half of the files sold by Stationery Kiosk F were purple files. How many purple files did Stationery Kiosk F sell?
2. Which colour(s) of files did Stationery Kiosk F sell less than Stationery Kiosk G? Give your answer(s) in letter(s) in alphabetical order. (Eg Blue, Red = B, R)
3. In May, Stationery Kiosk G sold 30 more yellow files than the number of yellow files sold in April. What was the percentage increase in the number of yellow files sold by Stationery Kiosk G from April to May?

(a)
Number of yellow files sold in Stationery Kiosk F = 175
Number of pink files sold in Stationery Kiosk F = 125
Number of orange files sold in Stationery Kiosk F = 25

Since purple files sold in Stationery Kiosk F is half of the files sold by Stationery Kiosk F, the total of yellow files, pink files and orange files is equal to purple files.

Number of purple files sold in Stationery Kiosk F
= 175 + 125 + 25
= 325

(b)
Number of yellow files sold in Stationery Kiosk F = 175 (More)
Number of yellow files sold in Stationery Kiosk G = 100

Number of pink files sold in Stationery Kiosk F = 125 (Equal)
Number of pink files sold in Stationery Kiosk G = 125

Number of orange files sold in Stationery Kiosk F = 25 (Less) 
Number of orange files sold in Stationery Kiosk G = 225

Number of purple files sold in Stationery Kiosk F = 325 (More) 
Number of purple files sold in Stationery Kiosk G = 250 

Colour(s) of files that Stationery Kiosk F sold less than Stationery Kiosk G = Orange (O)

(c)
Percentage increase in the number of yellow files sold by Stationery Kiosk G from April to May
= ³⁰₁₀₀ x 100%
= ³₁₀ x 100%
= 30%

Answer(s): (a) 325; (b) O; (c) 30%