Copyright © University of Cambridge. All rights reserved.

## 'Totality' printed from http://nrich.maths.org/

This is a game for two players.

You will need a copy of the game board and a counter.

Work out how to play by watching the video and discussing what you think the rules are.

Make sure you turn the sound off.

Check your rules by watching the video again with the sound on.

If you are unable to view the video, the rules of the game are hidden below.

**The aim of the game:**
Slide the shared counter across several adjacent numbers, adding them up as you go to make a 'running' total. Be the player to make the final slide so that the chosen target is reached exactly. Making the total go above the target loses you the game.

**How to play:**
1. Player 1 chooses a target to reach. This is the total both players try to make.

2. Player 2 places their counter on the game board over one of the numbers and says that number.

3. Player 1 moves the same counter in any direction along a line segment to a neighbouring number and announces the total of the two numbers.

4. Player 2 moves the same counter to cover a neighbouring number, adds on that number, and announces the 'running' total of the three numbers.

5. Players take it in turns to slide the counter to cover a neighbouring number and to add that number to the 'running' total.

6. Players must move when it is their turn.

7. No 'jumping' is allowed.