O-LevelMathematicsAlgebra and graphs4024/12 · May/June 2019 · Q226 Marks

Here are the first three patterns in a sequence made using dots and lines. [Figure of Pattern 1, Pattern 2, Pattern 3]

(a)Complete the table for the first five patterns in this sequence. [Table with Pattern number, Number of dots, Number of lines][2]
(b)Find an expression, in terms of n, for the number of lines in Pattern n.[2]
(c)Anwar makes one of these patterns using 92 lines. Find the number of dots in Anwar's pattern.[2]

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Mark scheme

Marking points from the official mark scheme (May/June 2019). The mark or mark type is shown in brackets.

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About this question

Topic

Algebra and graphs, O-Level Mathematics (syllabus 4024). Structured question, 6 marks.

Source

O-Level Mathematics, May/June 2019 Paper 1 Variant 2, question 22.

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