Question 1
SEAMO self-study edition 2027; not an official 2027 paper. Original source years are retained. 25 questions, 90 minutes; Q1–10: 3 points, Q11–20: 4 points, Q21–25: 6 points, total 100. Original response types and all subparts are preserved. Verified is an editorial convention; source defects, necessary assumptions and unresolved mathematical uncertainty are disclosed.
Find the missing number in the number puzzle below.
The source does not state the rule or provide an answer key. Use a simple pattern comparing corresponding positions across the three triangles; the proposed answer is conditional on that interpretation.
Find the missing number in the number puzzle below.
The source does not state the rule or provide an answer key. Use a simple pattern comparing corresponding positions across the three triangles; the proposed answer is conditional on that interpretation.