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MathNet 2015-part-02 — 191 problems (EN–VI) Question 149

Math Olympiad Vault · MathNet 2015-part-02 — 191 problems (EN–VI)

Question 149

a) Find the largest number that is the greatest common divisor of some four different two-digit numbers.

b) Find the largest number that is the least common multiple of some four different two-digit numbers.