Quantitative Aptitude - Arithmetic Ability Questions

While selling an article for Rs 18450, a person suffered a loss of 50%. At what price he should have sold the article (in Rs) to earn a profit of 50%?

When a discount of 20% is given on a sweater, the profit is 28%. If the discount is 14%, then the profit is

A student multiplied a number by 4/7 instead of 7/4. What is the percentage error in the calculation?

A profit of Rs. 960 is divided between A and B in the ratio 1/3:1/2. The difference of their profit is :

If m+n=1, then the value of m3+n3+3mnis equal to

The average weight of 100 students is 32 kg. The average weight of first 49 students is 30 kg and of last 50 students is 34 kg. What is the weight (in kg) of the 50th student?

The simple interest on a sum for 20 years is 5/4 of the principal. What is the per annum rate (in percentage) of interest?

Rohan and Mohit together can build a wall in 8 days. Mohit and Vikas build the same wall in 10 days and Vikas and Rohan can build the same wall in 12days. In how many days can all the three complete the same wall while working together?