The product of the ages of Swati and Aparna is 120. If thrice the age of Aparna is more than Swati's age by 2 years, fund the age of Swati.

The coordinates of the incentre of the triangle whose sides are 3x – 4y = 0, 5x + 12y = 0 and y – 15 = 0, are

Study the following graph to answer these questions :
Percent profit earned by two companies A & B over the years.
Profit = Income – Expenditure

Expenditure of Company B in 1999 was 90% of its expenditure in 1998. Income of Company B in 1999 was what percent of its income in 1998?

What will come in place of the question mark (?) in each of the following series?

15     19    83   119     631     (?)

If the least common multiple of two numbers, 1728 and K is 5184, then how many values of K are possible? 

Four years ago, the respective ratio between the age of Ram and that of Sonu, was 4 : 9. Tina is ten years older than Ram. Tina is ten years younger than Sonu. What is Tina's present age?