Apt Clocks Calendars — Free Aptitude Tutorial
Learn Apt Clocks Calendars in Aptitude with a free, beginner-friendly tutorial, examples and practice for Indian students on Syllab.in.
TL;DR: Learn Apt Clocks Calendars in Aptitude with a free, beginner-friendly tutorial, examples and practice for Indian students on Syllab.in.
Written & reviewed by the Syllab.in Academic Team (CBSE/NCERT subject experts) · Updated
Apt Clocks Calendars in Aptitude
Clock Problems: Minute hand moves 360° in 60 minutes = 6°/min. Hour hand moves 360° in 12 hours = 0.5°/min.
Angle between hands at h hours m minutes: |30h - 11m/2|. If > 180°, take 360° - result.
Hands coincide every 65.45 minutes (not 60). In 12 hours, hands overlap 11 times.
Calendar: Odd days concept — January has 31 days = 3 odd days (31 mod 7 = 3). Days of week repeat every 7 days.
Leap year: Divisible by 4. Century year: must be divisible by 400. 2000 is leap; 1900 is not.
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