If you write down all the names of the numbers from 1 to 100 how many times will you write the letter L?

Question

Is it possible to write down 1,2,3..100 in some order (one after an other), such that the sum of any two adjacent numbers is a prime number?

Answer 1

two times
eleven
twelve

Answer 2

If you write down all the names of the numbers from 1 to 100 the letter L appears two times (eleven and twelve)
two times
eleven
twelve

Answer 3

Only twice, for eLeven and tweLve.