Quantitative Aptitude - Arithmetic Ability Questions

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?

What is the average of first 19 odd numbers?

After a discount of 23% an article is sold for Rs 1848. What is the marked price (in Rs) of the article?

The average marks of 18 students in an examination was 60. It was later found that the marks of one student had been wrongly entered as 63 instead of 36. The correct average is:

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?

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?

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?