4 is represented by 4 letters: four
20 may be represented by 20 letters: nineteen and two halves
35 by 35 - letters: square root of twelve hundred twenty five

Find more such self-defining expressions.
No restrictions!

These were mine

0 =              
1 = I            
2 = II           
3 = III          
5 = a five       
6 = one six      
7 = one 'n' six  
9 = just a nine  
12 = eleven and one

https://www2.stetson.edu/~efriedma/mathmagic/1203.html

Posted by Jer on 2018-06-08 18:39:48