The hour and minute hands of my clock are at right angles.
How many degrees does each hand move forward in one minute? How long will it be before they are at right angles again?
Be careful, it will not be at half past three!
See the AIMSSEC Notes for Teachers.
This problem is adapted from the NRICH task Right Time with permission of the University of Cambridge. All rights reserved.
Tagged with: Angles • Mathematical reasoning • Time
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