Quantitative Aptitude - Arithmetic Ability Questions

A wholesaler had 200 dozens of mangoes. He sold some of these mangoes at 20% profit and the rest at 10% profit, so that he made 13% profit on selling all the mangoes. How many mangoes (in dozens) did he sell at 20% profit?

56/32 simplified value?

The value of(1(p-n)(n-q)+1(n-q)(q-p)+1(q-p)(p-n)) is

If Rs 7,800 is to be divided between A, B and C in the ratio 1/2 : 1/3 : 1/4, then how much share will B get (in Rs)?

The marked price of a chair is 40% more than its cost price. If the chair is sold for Rs 520 after a discount of Rs 40, then what will be the profit percentage?

A carpenter can build a cupboard in 48 hours. After 12 hours he takes a break. What fraction of the cupboard is yet to be built?

If p and q are the roots of the equation x2 –15x + r = 0 and p –q = 1, then what is the value of r ?

For x > 0, what is the minimum value of  x + x+22x?