If $$ {2sinθ-cosθ\over cosθ+sinθ}=1 $$ then the value of Cotθ is

A person bought pens at 25 for a rupee and sold at 15 for a rupee. What is his profit percentage? 

Suresh, Dinesh and Ramesh became partners in a business by investing money in the ratio of 3 : 6 : 8. If their investments is increased by 5%, 15% and 20%, respectively, then what will be the ratio of their profits for one year? 

What must be added to two numbers that are in the ratio of 3:4, so that they become in the ratio 4:5?

A runner starts running from a point at 6:00 am with a speed of 8km / hr. Another racer starts from the same point at 8:30 am in the same direction with a speed of 10km / hr. At what time of the day (in P.M.) will the second racer will overtake the other runner? 

A and B under took a work Rs 2200. A alone can do the work in 10 days and B alone can do the work in 12 days. If they work together, then what will be the difference (in Rs) in the amount they receive?  

If the number 247_679 is completely divisible by 9, then the smallest whole number in the place of the blank digit will be 

A sum is divided among 120 men and some women in the ratio 15:21. If each man gets Rs. 5 and each woman gets Rs. 4, the number of women is