PSLE
Stationery Shops G and H sell punchers of four colours. The bar graphs show the number of punchers sold by each shop in January. The bar for the number green punchers sold by Stationery Shop G has not been drawn.

1. Half of the punchers sold by Stationery Shop G were green punchers. How many green punchers did Stationery Shop G sell?
2. Which colour(s) of punchers did Stationery Shop G sell less than Stationery Shop H? Give your answer(s) in letter(s) in alphabetical order. (Eg Blue, Red = B, R)
3. In February, Stationery Shop H sold 10 less pink punchers than the number of pink punchers sold in January. What was the percentage increase in the number of pink punchers sold by Stationery Shop H from January to February?

(a)
Number of purple punchers sold in Stationery Shop G = 125
Number of pink punchers sold in Stationery Shop G = 250
Number of blue punchers sold in Stationery Shop G = 100

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

Number of green punchers sold in Stationery Shop G
= 250 + 100 + 125
= 475

(b)
Number of purple punchers sold in Stationery Shop G = 125 (Less) 
Number of purple punchers sold in Stationery Shop H = 150

Number of pink punchers sold in Stationery Shop G = 250 (More)
Number of pink punchers sold in Stationery Shop H = 100

Number of blue punchers sold in Stationery Shop G = 100 (Equal)
Number of blue punchers sold in Stationery Shop H = 100

Number of green punchers sold in Stationery Shop G = 475 (More) 
Number of green punchers sold in Stationery Shop H = 225 

Colour(s) of punchers that Stationery Shop G sold less than Stationery Shop H = Purple (P)

(c)
Percentage decrease in the number of pink punchers sold by Stationery Shop H from January to February
= ¹⁰₁₀₀ x 100%
= ¹₁₀ x 100%
= 10%

Answer(s): (a) 475; (b) P; (c) 10%