Question

What are the prime numbers spelt with prime number of letters?

Answer 1

two-3
three-5
seven-5
twenty three-11
thirty seven-11

Answer 2

If you look at prime numbers, you will know that all prime numbers are divisible by 1 or by themselves.  

If we look at 2 and write it in words, we write “two” which has 3 alphabets i.e. again a prime number. But all prime numbers when written in words do not have such property.  

For example, “103” is written as one hundred and three in words which has 18 alphabets. We know that 18 is not a prime number.