Five years ago Mathilde was six times older than her daughter. After five years, Mathilde will be 10 years more than two times the age of her daughter. Find the present age of Mathilde and her daughter.

The sum of first 8 terms of an arithmetic progression is 288. The ratio of term 5^{th} to term 25^{th} of the AP is 1:5. What is the value of the 79^{th} term of the AP?

Following chart shows number of students in a school who got distinction in one of three subjects. Find the number of students who got distinction in exactly two subjects.