PSLE
Stationery Shops T and U sell punchers of four colours. The bar graphs show the number of punchers sold by each shop in May. The bar for the number orange punchers sold by Stationery Shop T has not been drawn.

1. Half of the punchers sold by Stationery Shop T were orange punchers. How many orange punchers did Stationery Shop T sell?
2. Which colour(s) of punchers did Stationery Shop T sell less than Stationery Shop U? Give your answer(s) in letter(s) in alphabetical order. (Eg Blue, Red = B, R)
3. In June, Stationery Shop U sold 35 less green punchers than the number of green punchers sold in May. What was the percentage increase in the number of green punchers sold by Stationery Shop U from May to June?

(a)
Number of pink punchers sold in Stationery Shop T = 25
Number of green punchers sold in Stationery Shop T = 200
Number of purple punchers sold in Stationery Shop T = 100

Since orange punchers sold in Stationery Shop T is half of the punchers sold by Stationery Shop T, the total of green punchers, purple punchers and pink punchers is equal to orange punchers.

Number of orange punchers sold in Stationery Shop T
= 200 + 100 + 25
= 325

(b)
Number of pink punchers sold in Stationery Shop T = 25 (Less) 
Number of pink punchers sold in Stationery Shop U = 150

Number of green punchers sold in Stationery Shop T = 200 (More)
Number of green punchers sold in Stationery Shop U = 100

Number of purple punchers sold in Stationery Shop T = 100 (Equal)
Number of purple punchers sold in Stationery Shop U = 100

Number of orange punchers sold in Stationery Shop T = 325 (More) 
Number of orange punchers sold in Stationery Shop U = 175 

Colour(s) of punchers that Stationery Shop T sold less than Stationery Shop U = Pink (P)

(c)
Percentage decrease in the number of green punchers sold by Stationery Shop U from May to June
= ³⁵₁₀₀ x 100%
= ⁷₂₀ x 100%
= 35%

Answer(s): (a) 325; (b) P; (c) 35%