How many words (with or without meaning) of three distinct English alhabets are there?

How many different words (with or without meaning) can be formed using all the letters of word 'WARDEN'? How many of these words being with w and end with N?

How many words, with or without meaning, can be formed using all the letters of the word EQUATION, using each letter exactly once?

How many words, with or without meaning, can be formed using all the letters of the word EQUATION at a time so that the vowels and consonants occur together?

How many words, with or without meaning, each of 2 vowels and 3 consonants, can be formed from the letters of the word DAUGHTER ?

How many words, with or without meaning, each of 3 vowels and 2 consonants, can be formed from the letters of the word ‘INVOLUTE’ ?

How many words, with or without meaning, each of 2 vowels and 3 consonants can be formed from the letters of the word DAUGHTER ?