Quantitative Aptitude - Arithmetic Ability Questions

A trader had 2000 kgs of rice. He sold a part of it at 10% profit and the rest at 16% profit, so that he made a total profit of 14.2%. How much rice (in kg) did he sell at 10% profit?

A dishonest shopkeeper uses a weight of 850 gm instead of 1 kg and sells rice on its cost price. What will be his profit percentage on selling 5 kg rice?

P, Q and R alone can complete a work in 12, 15 and 20 days respectively. In how many days will they together complete the same work?

The interest earned on Rs. 1600 at the rate of 5% S>I per annum for 6 yrs would be:

If a + b = 11 and a2+ b2= 61, then value of ab is

After deducting 60% from a certain number and then deducting 15% from the remainder, 1428 is left. What was the initial number?

26 is 0.4% of which number?

Which number is 30% less than 80% of 800?