Chang's Math blog
Compilation of all things math --- questions obtained via students' consultation, related math sites. * Do also check out my EduTech contributions at go.gov.sg/changcl
Tuesday, September 22, 2026
Monday, September 21, 2026
Friday, September 18, 2026
Wednesday, September 16, 2026
Tuesday, September 15, 2026
Monday, September 14, 2026
Saturday, September 12, 2026
Thursday, September 10, 2026
Wednesday, September 9, 2026
Tuesday, September 8, 2026
P6 Geometey
______ my solution
Must read every word in the question stem. Many a times question setters plant clues in the question stem but deliberately NOT INDICATE them in the diagram. Many students do not read the entire question; they would rather do the most unwise act: making assumptions!
Sunday, September 6, 2026
P6 Pattern (NPS prelim 2026)
(a) Which column and row will 2026 be in?
(b) What number will be in Row 67 Column C?
______
My solution
Friday, September 4, 2026
Thursday, September 3, 2026
How many rotations before A goes back to starting position
How many rotations before A goes back to starting position
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