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Foundation November 2020 Paper 2 Q4

EduqasFoundationCurrent spec4 marksSequences

4.

(a)

Here are the first four patterns in a sequence.

Diagram: patterns 1 to 4 made of black circles; pattern 1 has 2 circles side by side, and each later pattern adds one circle to a vertical column on the right (3, 4 and 5 circles); a space is left for pattern 5
(i) Draw pattern 5. [1]
(ii) How many circles will be in pattern 6? [1]
(iii) Which pattern uses exactly 99 circles? [1]
(b)

Here are the first four patterns in a different sequence.

Diagram: patterns 1 to 4; pattern n is a row of n white squares with a black triangle above and below each square

Write down the rule connecting the number of triangles with the number of squares in each pattern. [1]

Number of triangles = ………………

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