PSLE
The pie chart shows the number of notebooks, post-it pads, pencils and punchers sold by a shop. The same information is shown in a bar graph, but the names of the items are not shown on the bar graph. How many less post-it pads than notebooks are sold?


Bar 1 is the shortest bar. It is the number of post-it pads.
Number of post-it pads = 4

Bar 4 is the tallest bar. It is the number of notebooks.
Number of notebooks = 25

Bar 2 is the second shortest bar. It is the number of pencils.
Number of pencils = 10

Bar 3 is the second tallest bar. It is the number of punchers.
Number of punchers = 19

Number of less post-it pads than notebooks sold
= 25 - 4
= 21

Answer(s): 21