If a3+ b3 = 19 and a + b = 1, then what is the value of ab?

If x/3 - [5(7x/5 - 4/3)]/2 = -x/6, then what is the value of x?

If in 2 years at simple interest the principal increases by 18%, what will be the compound interest (in Rs) earned on Rs 7000 in 3 years at the same rate?

To cover a distance of 144 km in 3.2 hours what should be the average speed of the car in meters/second?

What is the value of 10% of 150% of 400?

A shopkeeper by selling 21 items earns a profit equal to the selling price of 1 item. What is his profit percentage?

The average weight of P, Q and R is 45 kg. If the average weight of P and Q be 36.5 kg and that of Q and R be 52 kg, then what is the weight (in kgs) of Q?

Profit of Rs 1,03,500 has to be divided between three partners A, B and C in the ratio 11:7:5. How much amount (in Rs) does B get?