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Instructions: Use the arrow keys (or swipe) to move the tiles. When two tiles with the same number touch, they merge into one tile to make a double. What is the largest double you can make?

Trophies are available for creating tiles of the following values:

128 - Level 1 trophy
256 - Level 2 trophy
512 - Level 3 trophy
1024 - Level 4 trophy
2048 - Level 5 trophy

# Double Take

Learn the powers of two up to 2048!

#### One Torch Tunnel

Solve the problem of getting four people through a tunnel with one torch in the minimum amount of time. The solution is not obvious but when you get it you see the elegance and beauty of its cunning.

Learning the sequence of doubling numbers (powers of two) is a worthwhile pursuit for children of all ages. This game is lots of fun to play, does not require the player to already know the doubling sequence, but presents the numbers in context and in a way that will help the child learn and recognise them.

Play the game little and often! Do not spend hours and hours playing but do spend ten minutes every day working to improve your score. Your personal best score is shown at the top right of the screen and this provides a target for you to try and beat. Earn trophies as you achieve the high score tiles.

Enjoy playing the game and learning more mathematics as you do.

Comment recorded on the 19 October 'Starter of the Day' page by E Pollard, Huddersfield:

"I used this with my bottom set in year 9. To engage them I used their name and favorite football team (or pop group) instead of the school name. For homework, I asked each student to find a definition for the key words they had been given (once they had fun trying to guess the answer) and they presented their findings to the rest of the class the following day. They felt really special because the key words came from their own personal information."

Comment recorded on the 17 November 'Starter of the Day' page by Amy Thay, Coventry:

"Thank you so much for your wonderful site. I have so much material to use in class and inspire me to try something a little different more often. I am going to show my maths department your website and encourage them to use it too. How lovely that you have compiled such a great resource to help teachers and pupils.
Thanks again"

#### Circle Equations

Recognise and use the equation of a circle with centre at the origin and the equation of a tangent to a circle. So far this activity has been accessed 36 times and it is ready for you to enjoy!

This game is adapted from code created by Gabriele Cirulli based on 1024 by Veewo Studio and conceptually similar to Threes by Asher Vollmer. The details of the copyright notice can be seen here.

In the video below Steve Mould and James Grime discuss 2048 strategy and Maths.

Do you have any comments? It is always useful to receive feedback and helps make this free resource even more useful for those learning Mathematics anywhere in the world. Click here to enter your comments.

 Level 1 Level 2 Level 3 Level 4 Level 5

Bar chart showing the number of trophies earned claimed for each level

#### Number Crunch Saga

A lively numeracy game requiring you to align three numbers to create the given target sum or product.

Transum.org/go/?to=saga

#### Remainder Race

A game involving chance and choice requiring an ability to calculate remainders.

Transum.org/go/?to=remainder

#### Sum Game

A game against the clock to find the numbers which add up to the target number.

Transum.org/go/?to=sumgame

#### Discombobulated

A fun game requiring you to find numbers which add up to the target number as quickly as possible.