Quantitative Aptitude - Arithmetic Ability Questions

The value of x for which the expressions 15 ­ 7x and 15x + 7 become equal is _____.

If Reena sold 12 mobile phones for Rs. 1,88,160 which cost Rs. 14,056 per phone, what was the total profit made by her?

The point where the 3 medians of a triangle meet is called

A and B together can do a piece of work in 10 days. If A can do the work in 15 days, find in how many days that B alone can do the same work. Given below are the steps involved in solving the above problem. Arrange them in sequential order.

A) One day's work of B is 1/10 - 1/15

B) One day's work of A and B is 1/10 and One day's work of A is 1/15

C) B alone can do the work in 30 days

D) One day's work of B is 1/30

The volume of a right circular cone, whose radius of the base is same as one-third of its altitude, and the volume of a sphere are equal. The ratio of the radius of the cone to the radius of the sphere is :

In the following question, select the missing number from the given series.
 
1912, 2012, 2133, 2277, 2446, ?

The sum of 15 observations of a data is (434 + x). If the mean of the data is x, then the value of x is

The ratio of cost price and selling price 25:26. The percent of profit will be