How many 4-letter words with or without meaning, can be formed using the letters of the word RUCHIKA, if (i) Repetition of letters is not allowed (ii) Repetition of letters is allowed

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 two letter words can be formed using letters from the word SPACE, when repetition of letters (i) is allowed, (ii) is not allowed?

How many words (with or without meaning) can be made from the letters of the word MONDAY, assuming that no letter is repeated if (i) 4 letters are used at a time (ii) All letters are used at a time (iii) All the letters are used but the first is vowels.

How many permutations can be made out of the letters of the word COMMERCE?

How many 4 letter words can be formed using letters in the word MADHURI if (a) letters can be repeated (b) letters cannot be repeated.

How many 5 letter words can be formed using letters in the word NIRMAL if (a) letters can be repeated (b) letters cannot be repeated

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)