Question 1 :
There  are 'mn' letters and n post boxes. The number of ways in which these letters can be posted is:
Question 2 :
Find the number of permutations that can be made with the letters of the word $'MOUSE'$
Question 3 :
Using the  digits $0,  2, 4, 6,  8$ not  more than once in any number, the number of $5$ digited numbers that can be formed is<br/>
Question 4 :
How many different signals can be transmitted by arranging 3 red, 2 yellow and 2 green flags on a pole? [Assume that all the 7 flags are used to transmit a signal].
Question 5 :
$15$ buses operate between Hyderabad and Tirupathi.The number of ways can a man go to Tirupathi from Hyderabad by a bus and return by a different bus is
Question 6 :
The number of different ways in which $5$ 'dashes' and $8$ 'dots' can be arranged, using only $7$ of these 'dashes' and 'dots', is
Question 7 :
The number of 5-digit even numbers that can be made with the digits 0,1,2 and 3 is
Question 8 :
Number of ways 6 rings can be worn on four fingers of one hand?
Question 9 :
The letters of the word COCHIN are permuted and all the permutations are arranged in an alphabetical order as in an English dictionary. The number of words that appear before the word COCHIN is
Question 10 :
There are three copies of Harry Potter,four copies of The Last Symbol and five copies of The Secret of the Unicorn. In how many ways can you arrange these books in a shelf?
Question 11 :
The number of permutations of the letters of the word AGAlN taken three at a time is<br>
Question 12 :
How many $3$ digit numbers can we make using the digits $4,5,7$ and $9$ and where repetition is allowed?
Question 13 :
How many different signals can be made by hoisting $6$ differently coloured flags one above the other, when any number of them may be hoisted at once?