0580/42 Feb/Mar 2025, Question 3: Lines of Symmetry
Cambridge IGCSE Mathematics 0580 · Paper 42 (Extended) · Calculator · 1 mark
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The question, in short
On a 5 by 5 grid with four shaded squares, shade two more small squares so the pattern has two lines of symmetry.
Summarised in our own words. Use the official paper for the exact wording and the diagram.
Solution · 1 mark
- 1The pattern must be symmetric in both diagonals
- 2Row 1 column 3 reflects to row 3 column 1; row 2 column 2 reflects to row 4 column 4
- 3Shade row 3 column 1 and row 4 column 4
AnswerShade row 3 column 1 and row 4 column 4 (rows from the top, columns from the left)
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Also searched as: 0580/42/F/M/25 · 0580_m25_qp_42 · 0580 m25 42 · question 3.
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