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VTMO 2026 - Grade 5 - Semifinal - SET 10 - Self-study Question 12

VTMO · VTMO 2026 - Grade 5 - Semifinal - SET 10 - Self-study

Question 12

A digital clock displays every minute from 00:00 to 23:59. At how many times in one day do the two hour digits have sum 5 and the two minute digits also have sum 5? For example, 05:41 and 14:05 satisfy the conditions.

Question illustration
  1. 22
  2. 20
  3. 16
  4. 18
  5. 32