PSLE
Stationery Kiosks L and M sell punchers of four colours. The bar graphs show the number of punchers sold by each shop in May. The bar for the number pink punchers sold by Stationery Kiosk L has not been drawn.

1. Half of the punchers sold by Stationery Kiosk L were pink punchers. How many pink punchers did Stationery Kiosk L sell?
2. Which colour(s) of punchers did Stationery Kiosk L sell less than Stationery Kiosk M? Give your answer(s) in letter(s) in alphabetical order. (Eg Blue, Red = B, R)
3. In June, Stationery Kiosk M sold 15 less purple punchers than the number of purple punchers sold in May. What was the percentage increase in the number of purple punchers sold by Stationery Kiosk M from May to June?

(a)
Number of blue punchers sold in Stationery Kiosk L = 30
Number of purple punchers sold in Stationery Kiosk L = 90
Number of orange punchers sold in Stationery Kiosk L = 100

Since pink punchers sold in Stationery Kiosk L is half of the punchers sold by Stationery Kiosk L, the total of purple punchers, orange punchers and blue punchers is equal to pink punchers.

Number of pink punchers sold in Stationery Kiosk L
= 90 + 100 + 30
= 220

(b)
Number of blue punchers sold in Stationery Kiosk L = 30 (Less) 
Number of blue punchers sold in Stationery Kiosk M = 90

Number of purple punchers sold in Stationery Kiosk L = 90 (More)
Number of purple punchers sold in Stationery Kiosk M = 30

Number of orange punchers sold in Stationery Kiosk L = 100 (Equal)
Number of orange punchers sold in Stationery Kiosk M = 100

Number of pink punchers sold in Stationery Kiosk L = 220 (More) 
Number of pink punchers sold in Stationery Kiosk M = 90 

Colour(s) of punchers that Stationery Kiosk L sold less than Stationery Kiosk M = Blue (B)

(c)
Percentage decrease in the number of purple punchers sold by Stationery Kiosk M from May to June
= ¹⁵₃₀ x 100%
= ¹₂ x 100%
= 50%

Answer(s): (a) 220; (b) B; (c) 50%