How many words comprising of any three letters of the word UNIVERSAL can be formed

Q. How many words can be formed by taking three letters from the letters of the words "SERIES" ?

Q. Assuming that any arrangement of letters forms a word, how many words of any length can be formed from the letters of the word ${}^{\prime }SQUAR{E}^{\prime }$ (No repetition of letters)

Q. Rearrange the first four letters in any way of the word DECISION Find how many words can be formed by using all the four words

Q. How many different three letter words, can be made from the letters of the word CHANGE, both with and without meaning but without any repetition?

Q. How many words can be formed from the letters of the word "RAHUL"

1. 6250 , 120
2. 3125 , 240
3. 3125 , 120
4. 1050 , 120