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Helping Students with PSLE Mathematics - NIE Mathematics ...

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Table 1 consists of numbers from 1 to 56. Kay and Lin are given a plastic<br />

frame that covers exactly 9 squares of Table 1 <strong>with</strong> the centre square<br />

darkened.<br />

d<br />

(a) Kay puts the frame on 9 squares as shown in the figure below.<br />

3 4 5<br />

11 13<br />

19 20 21<br />

3+4+5+11+13+19+20 13 19 = 96<br />

96 ÷ 8 = 12<br />

Alternate Method<br />

4 x 24 = 96<br />

96 ÷ 8 = 12<br />

What is the average of the 8 numbers that can<br />

be seen in the frame?

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