NRICH: Stop the Clock

This is a game for two players. Can you find out how to be the first to get to 12 o’clock?


This is a game for two players. You can use the interactivity, or you could print off a page of blank clock faces in Word or as a pdf.

Set the time on the clock to 6 o’clock to start the game.
Decide who will go first (player 1) and who will go second (player 2).
Take it in turns to choose to move the hands of the clock on by 12 hour or by 1 hour. For example, player 1 could choose 12 hour, so the clock hands move to 6.30, then player 2 might choose 1 hour, moving the clock hands to 7.30… etc.
The winner is the player who moves the hands exactly onto 12 o’clock.

Can you work out a winning strategy so that you can always beat your opponent?

Ages 5 – 7

Math Topics
Measurement & Time
Kindergarten, 1st Grade, 2nd Grade
Descriptions of PDFs

Blank clock face.

What are you looking for?


NRICH (University of Cambridge)

Website URL

Type of Resource

Board/Card Game
Online Game
PDF File

Assigned Categories