Quantitative Aptitude - Arithmetic Ability Questions

If a - b = 10 and ab =-21, then what is the value of a3-b3 ?

Profit of Rs 728000 has to be divided among three partners Amir, Balaraj and Charan in the ratio 7:5:4. How much share (in Rs) does Charan get?

An object travels 23 m in 3 s and then another 15 m in 2 s. What is the average speed of the object?

P and Q can do a project in 12 and 12 days respectively. In how many days can they complete 50% of the project if they work together?

In a class, average height of all students is 'a' cms. Among them, average height of 10 students is 'b' cms and the average height of the remaining students is 'c' cms. Find the number of students in the class. (Here a>c and b>c )

If a - b = -5 and a2+b2=73, then find ab.

If cosec2 θ = 625/576, then what is the value of [(sin θ – cos θ)/(sin θ + cos θ)]?

The least value of tan2x + cot2x is