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Problem #80 · October 15, 2026

EKUB — greatest common divisor and EKUK — least common multiple

Find the greatest common divisor of the numbers 17 and 51.
  1. A1
  2. B3
  3. C17
  4. D51
  5. E867

WORKED EXAMPLE

Solution

Because 51=3⋅1751 = 3 \cdot 17, the number 17 divides 51 without a remainder. If one number divides the other, then EKUB equals the smaller number itself: EKUB(17;51)=17EKUB(17; 51) = 17.
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