Class News

Math

 

I have 5 coloured discs in a pile as shown.

I take the top two discs and put them on the bottom (with the red disc still on top of the blue disc). Then I again take the top two discs and put them on the bottom.  

 

If I do this until I have made a total of 21 moves, which disc will be on the bottom?

 

 

(Race your answers to Ms Brennan tomorrow!)