Quantitative Aptitude - Arithmetic Ability Questions

If a is positive and a2+1a2 = 7, then a3 + 1a3 = ?

A vendor buys 6 bananas for Rs 25 and sells them at 3 for Rs 20. What is his profit percentage?

3 hrs after a goods train passed a station, another train travelling at a speed of 88 km/hr following that goods train passed through that station. If after passing the station the train overtakes the goods train in 8 hours. What is the speed of the goods train?

If x2-2x+1=0,then the value of x4+1x4 is

If x + y = 12 and x2 + y2 = 94, then xy is 

Find x, if 5x-6+5x+6 = 6

In a mixture of milk and water, there is 19% milk. If the quantity of milk in the mixture is 437 mililitres, then what is the total quantity (in millilitres) of mixture?

On selling 56 chairs, Mohan earns profit equal to the selling price of 6 chairs. What is the profit percentage?