The ratio of the ages of Esha and her mother is 1 : 4 and the ratio of the ages of Esha's mother and her brother is 9 : 1. If Esha's brother is 5 years younger than Esha. What will be the age of Esha's mother after 4 years?

In the given figure, DE‖BC and DE=1/3 BC if area of triangle ADE=20 sq. cm, then what is the area (in sq.cm) of the triangle DEC?

In the given figure, PQR is an equilateral triangle and PS is the angle bisector of angle P. What is the value of RT : RQ?

Direction: Study the double bar graph given below and answer the questions.

The average of the number of students participating in exhibition is:

What is the average of the squares of the first 19 natural numbers? 

Running 4/3 of his usual speed, a person improves his timing by 10 minutes. Find his usual time to cover the given distance.