The value of 0! is

The value of n! is

2.6.10.14... upto 20 factors is equal to 

Which of the following is not correct?

In how many ways can 4 prizes be distributed among 5 boys such that no boy gets more than one prize?

The number of ways in which 5 pictures can be hung from 71 picture nails on the wall is

How many words can be made by using the letters of the word 'SCHOLAR' taken all at a time?

The number of different permutations of the word 'SCHOOL is

The number of all possible words that can be formed using the letters of the word 'MATHEMATICS' is

The number of 7 digit numbers which can be formed using  the digits 1,2,3,2,3,3,4 is 

Using the letters of the word TRICK, a five letter word with distinct letters is formed such that C is in the middle. In how many ways this is possible?

The number of ways in which 5 boys and 3 girls be seated in a row so that each girl is between two boys is

The number of ways in which 5 girls and 3 boys can be seated in a row so that no two boys are together is 

The number of different ways of preparing a garland using 6 distinct, white roses and 5 distinct red roses such that no two red roses come together, is

The number of ways in which 7 boys and 7 girls can sit alternatively  is

From 6 different novels and 3 different dictionaries, 4 novels and 1 dictionary are to be selected and arranged in a row on a shelf so that dictionary  is always in the middle. The number of such arrangement is

The number digits of all numbers having 5 digits, with is 

How many words can be formed from the of letters of the word 'SLAUGHTER' so that all the vowels come together? 

How many different arrangements of the word *MOTHER" can be made such that the vowels Occupy only the odd places? 

The number of words that can be formed out of the letters of the word "ARTICLE" so that the vowels occupy even places is

How many ways are there to arrange the letters in the word 'GARDEN' with the vowels in alphabetical order

Consider all possible permutations of the letters of the word ENDEANOEL. The number of permutations in which letters A, E, O occur only in odd positions, is 

The number of arrangements of the letters of the word BANANA' in which two N's do not appear adjacently is 

How many different words can be formed using the letters of the word "ALLOTMENT"? In how many of them both the L' do not come together? 

How many words can be formed from the letters of the word PROGRAMMING such that th words neither start with M nor end with M2

If all the words (with or without meaning) having five letters, formed using the letters of the word SMALL and arranged as in a dictionary; then the position of the word SMALL is 

The letters of the word COCHIN are permuted and all the permutations are arranged in an The alphabetical order as in an English dictionary. word number of words that appear before the word COCHIN, is 

Eight different letters of an Words alphabet are given. of four letters from these are formed. The number of such words with at least one letter is repeated is 

If the letters of the word  SACHIN' are arranged in all possible ways and these words are written out as in a dictionary, then the word SACHIN appears at serial number