How many three letter words are formed using the letters of the word FAILURE?

How many three letter words can be formed using the letters of the word NARESH? (Repetition of letters is not allowed)

How many three letter words can be formed using the letters of the word SQUARE? (Any arrangement of letters is called a word even though it may or may not have any meaning)

How many 4 letter words can be formed using the letters of the word ARTICLE such that the word contains A but not E

How many 4 letter words can be formed using the letters of the word 'ARTICLE' such that the words contain A but bot E

How many 4 letter words can be formed using the letters of the word 'ARTICLE' such that the words do not contain A

How many 4 letter words can be formed using the letters of the word ARTICLE such that each word begin with vowel

How many 4 letter words can be formed using the letters of the word 'ARTICLE'. Find the number of words if i) that begin with an vowel ii) containing A

How many three letter words can be made using the letters of the word ORIENTAL?