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.
Each different symbol in the addition stands for a different number. Given that the U-shaped symbol is greater than the slashed-circle symbol, what is the largest possible value of U-shaped symbol minus slashed-circle symbol?
Each symbol represents one decimal digit; the same symbol always has the same digit, different symbols have different digits, and leading digits are nonzero. The four stars represent the same digit.
Each different symbol in the addition stands for a different number. Given that the U-shaped symbol is greater than the slashed-circle symbol, what is the largest possible value of U-shaped symbol minus slashed-circle symbol?
Each symbol represents one decimal digit; the same symbol always has the same digit, different symbols have different digits, and leading digits are nonzero. The four stars represent the same digit.