State two ways in which the body shape of girls changes during puberty.

(a) What are the two ways in which the physical states of matter can be changed ? (b) Draw the 'states of matter triangle' to show the interconversion of states of matter. (c ) How can the evaporation of a liquid be made faster ?

Find the number of ways in which 5 boys and 3 girls can be arranged in a row so that no two girls are together.

Let n be the number of ways in which 5 boys and 5 girls can stand in a queue in such a way that all the girls stand consecutively in the queue.Let m be the number of ways in which 5 boys and 5 girls can stand in a queue in such a way that exactly four girls stand consecutively in the queue.Then the value of m/n is

The number of ways in which 8 boys and 5 girls can sit around a round table so that no two girls come together is

Total number of ways in which 4 boys and 4 girls can be seated around a round table, so that no two girls sit together, is equal to.

The number of ways in which 6 boys and 7 girls can sit in a row such that no two girls are together is