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Problem #18 · August 14, 2026

Greatest common divisor EKUB and least common multiple EKUK

Find the least common multiple of 7 and 9.
  1. A1
  2. B16
  3. C21
  4. D27
  5. E63

WORKED EXAMPLE

Solution

EKUB(7;9)=1EKUB(7; 9) = 1, so these numbers are coprime. The least common multiple of coprime numbers equals their product: 7⋅9=637 \cdot 9 = 63.
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