The number of ways of permuting the letters of the word DEVIL so that neither D is the first letter nor L is the last letter is

Number of ways of permuting the letters of the word ENGINEERING so that the order of the vowels is not changed is

The number of permutations of taken 4 letters from the word 'DEGREE' is

How many permutations of the letters of the word 'APPLE' are there?

How many permutations of the letters of the word 'SERIES' are there?

How many different four letter words can be formed (with or without meaning) using the letters of the word MEDITERRANEAN such that the first letter is E and the last letter is R.

The number of other permutations of the letters of the word SIMPLETON taken all at a time is: