10 years ago, respective ratio of the age of mother and daughter was 4 : 1. 10 years later, the respective ratio of the age of mother and daughter will become 2 : 1. At present, what is the sum of their age?

The value of x for which the expressions 7x + 13 and 13x - 7 become equal is _____ .

The average of 10 numbers is 14. If each number is multiplied by 6 then what will be the new average?

Directions: A survery of film watching habits of people living in five cities P, Q, R, S and T is summarised below in a table. The coulmn I in the table gives percentage of film-watchers in each city who see only one film a week. The column II gives the total number of film-watchers who see two or more films per week.

Read the table and answer the following questions.

Which city has the highest number of film watchers who see only one film in a week? 

A dealer marks a washing machine for ₹7500, and allows a discount of 6% on it. Find the selling price 

The sum of length, breadth and height of a cuboid is 20 cm. If the length of the diagonal is 12 cm, then find the total surface area of cuboid.

Table below shows the number of candidates appearing for the interview and the percentage of candidates found eligible for the post in various companies (A, B, C, D, E, F).
Study the Tables and give answer the following Questions.

What is the difference between the qualified candidates of Company A and Company D?

If the orthocenter and the centroid of a triangle are the same, then the triangle is: