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HKIMO 2026 Grade 5 National Final (Heat) Set 05 Question 15

HKIMO · HKIMO 2026 Grade 5 National Final (Heat) Set 05

Question 15

What is the smallest integer divisible by three different prime numbers?

Source glossary (English–Vietnamese): Smallest integer: số nguyên nhỏ nhất; Divisible: chia hết; Prime numbers: số nguyên tố.

Editorial clarification: interpret “smallest integer” here as “smallest positive integer.” Over all integers there is no least such value, because negative multiples are unbounded below.