I don’t really remember where the idea for this one came from. It is a representation of binary numbers. We usually count using the decimal system. It is thought of as a system of counting in tens. It uses a 0 and nine other digits to represent all numbers. There is no specific symbol to represent ‘ten’. We have to use two columns of digits, for a 1 and a 0, to make 10. This system is sometimes called ‘Base 10’. The headings of the columns can be written as:  


10000s 
1000s 
100s 
10s 
1s 

or 

104 
103 
102 
101 
100 

Binary is a system of counting in twos. It uses 0 and 1; there is no symbol for ‘two’. In a similar way to the decimal system, we have to use two columns of digits, for a 1 and a 0. This system is sometimes called ‘Base 2’. The column headings can be written as  


16s 
8s 
4s 
2s 
1s 

or 

24 
23 
22 
21 
20 

Similarly, Base 3 would use the digits 0, 1 and 2, but the equivalent of three would be written in two columns as 10. Base 4 would use 1, 2 and 3, but no four. The two In the pastel version the 1s have been coloured, using a different colour in each column. The 0s are all white, to form the background.  







