If a man's salary is 20% more than that of his son, how many percent is the son's salary if compared to the salary of his father ?

A woman is 30 times older than her son. 18 years later she will be thrice as old as her son. What is the woman...

If x men can do a work in 8 days and x+4 men can do it in 6 days, what is the value of x ?

If product of two sequential positive odd numbers is 255, what are those numbers ?

In a garden, there are 10 rows and 12 columns of mango trees. The distance between two trees is 2 meters and a...

The rent of a guest house was Tk 50 per day for first three days Tk 100 per day for next 5 days and Tk 300 per...

A motorist travels to a place 150 m away at an average speed for 50 km and returns at 30 km per hour. What is...