Skip to content / Đến nội dung
ThichHocToan.com

VTMO 2026 - Grade 9 - Semifinal - SET 06 - Self-study Question 9

VTMO · VTMO 2026 - Grade 9 - Semifinal - SET 06 - Self-study

Question 9

How many minutes after 10:00 do the hour and minute hands first become perpendicular?
  1. 5
  2. $5\frac12$
  3. $5\frac6{11}$
  4. $5\frac5{11}$
  5. Another answer