Quantitative Aptitude - Arithmetic Ability Questions

The solution set of 4x -­ 3y = 10 and 3x + y = 14 is

Ankit runs 324 metres every day for his fitness. According to his daily routine in how many days he covers 8.1 km.

B is thrice as efficient as A and C is 0.75 times as efficient as A. What is the ratio of number of days taken by A, B and C when they work individually?

What is the quotient when 7251 is divided by 66?

What is the sum of all natural numbers between 100 and 400 which are divisible by 13?

In a cricket match, the scores of the players are considered such that coefficient of variation of scores is 16 and mean is 25 then the variance is

A sum of money becomes 77/50 of itself in 18/5 years when invested at simple interest. What is the rate (in percentage) of interest per annum?

When a discount of 25% is given on a box of popcorn, the profit is 25%. If the discount is 10%, then the profit is