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VTMO 2016 — Grade 2 — semifinal Question 9

VTMO · VTMO 2016 — Grade 2 — semifinal

Question 9

Ti and Suu have reversed two-digit numbers totaling $33$. What is their difference?
  1. $12$
  2. $21$
  3. $8$
  4. $9$
  5. $10$