24 workers can build a wall in 15 days. How many days will 9 workers take to build a similar wall?

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

If 36 workers can build a wall in 12 days, how many days will 16 workers take to build the same wall ? (assuming the number of working hours per day is constant)

Four workers can build a house in 9 days. How many days would it takes 3 workers to build the same house?

Four persons can build a wall in 12 days . How many persons will be required to build the same will in 8 days.

14 workers can build a wall in 42 days. One worker can build it in

If 3 men and 4 women can build a wall in 43 days , in how many days can 7 men and 5 women build this wall ?