Question
One way of extending the number system in Method 2 is by using strings with more than one letter — for example, we could use ‘aa’ for 27. How can you extend this system to represent all the numbers? There are many ways of doing it!
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Answer
One of the ways of extending the number system in Method 2 by using strings with more than one letter is :
| Single letter | Double letter combination | Triple letter combination |
| a = 1 b = 2 c = 3 .... z = 26 | aa = 27 ab = 28 ac = 29 .... az = 52 ba = 53 bb = 54 bc = 55 .... zz = 702(26 x 26 + 26) | aaa = 703 aab = 704 aac = 705 and so on ... |
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