A family has 8 members. Four members take food two times a day on two identical round tables. For how many months 8 members can take food by sitting in different orders (1 month 30 days)

Four men and four women sit to dine at a round table. In how many ways can they seat themselves so that no two women are together ?

Thirteen persons take their places at a round table. In how many arrangements two particular person sitting together?

For a group of 500 members is a food provision for 24 days. If 300 more Joined in the group for how many days the food will be sufficient?

A committee of 11 members sits at a round table. In how many ways can they be seated if the 'President' and the 'Secretary' choose to sit together?

A committee of 11 members sits at a round table. In how many ways can they be seated if the 'President' and the 'Secretary' choose to sit together?

A committee of 11 members sits at a round table. In how many ways can they be seated if the 'President' and the 'Secretary' choose to sit together?

If 24 workers can build a wall in 15 days, how many days will 8 workers take to build a similar wall?

A train time table must be compiled for various days of the week, so that two trains twice a day depart for three days, one train daily for two days, and three trains once a day for two days. How many different time tables can be compiled?

If 10 persons can dig 8 feet trench in 12 days, then how many days will 8 persons take to dig 6 feet trench?

40 men take 8 days to earn Rs 2000 .How many men can earn Rs 200 in 2 days?