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VTMO 2017 — Grade 7 — semifinal Question 5

VTMO · VTMO 2017 — Grade 7 — semifinal

Question 5

Distinct natural $x , y$ have $\operatorname{gcd} 6$ and ratio $6 : 7$. Find their sum.
  1. $18$
  2. $42$
  3. $48$
  4. $78$
  5. Other