Find the number of signals which can be given with 5 flags of different colours hoisted one above the other, by using any number of flags.

How many signals can be made by hoisting 5 flags of different colours ?

Find the number of different signals that can be generated by arranging at least 2 flags in order (one below the other) on a vertical staff, if five flags are available.

Sum of two numbers is 53 .If one exceeds the other by 5,find the numbers.

Find the numbers of ways in which 5 girls and 5 boys can be arranged in a row if no two boys are together.

Find the number of different signals that can be made by arranging at least three flags in order on a vertical pole, if 6 different flags are available.

Find the number of ways in which n different beads can be arranged to form a necklace.

How many different signals can be generated from 6 flags of different colours if each signal makes use of all the flags at a time, placed one below the other?

Sum of two numbers is 95. If one exceeds the other by 15, find the numbers.