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? Main menu Search. Hide Menu. You may also like Five Coins Ben has five coins in his pocket. How much money might he have? The Puzzling Sweet Shop There were chews for 2p, mini eggs for 3p, Chocko bars for 5p and lollypops for 7p in the sweet shop.
Little Man The Man is much smaller than us. To support this aim, members of the NRICH team work in a wide range of capacities, including providing professional development for teachers wishing to embed rich mathematical tasks into everyday classroom practice. Register for our mailing list. Can you work out a winning strategy so that you can always beat your opponent? All rights reserved. Stop the Clock is a motivating context in which children can develop their fluency with telling the time and calculating time intervals.
However, the real challenge here is to find a winning strategy and, at the highest level, to be able to beat an opponent whatever the start time and whatever the time intervals. Introduce the game to the class by playing as a whole group, perhaps one half against the other, several times. Then suggest that children play in pairs, either at computers, or by using sheets of blank clocks Word document or pdf to record their game.
Challenge them to find a strategy for beating their partner. As they play, circulate around the classroom and ask them what they think is important so far. Some might suggest that in order to win, they must make the clock show Others may have thought further back and have ideas about how they can make sure they get to After a suitable length of time bring the whole class together and invite one pair to demonstrate their strategy, explaining their decisions as they go along.
Use other ideas from the group to refine the strategy. You could then choose some extension ideas see below for pairs to work on - perhaps different pairs working on a different set-up.
0コメント