Deven said , "If you add -3 to my sister's age, you   will get my age". If Deven is 12 years old, how old is his sister ?

A person has Re. 1, Rs. 2 and Rs. 5 coins. If the number of Rs. 5 coins is twice the number of Rs. 2 coins and the total number of coins is 200. Find the total sum of money he has if there are 50 Rs. 2 coins.

What should be added to to make it a perfect square

In a bag, there are coins of 25 p, 10 p and 5 p in the ratio of 1 : 2 : 3. If there is Rs. 30 in all, how many 5 p coins are there?

Factorize: 

Find the nature of the roots of 

5 years ago a man was 7 times as old as his son . He will be 3 times as old as his son after 5 years. Find their present ages.

Two numbers are such that the ratio between them is 3 : 5. If each is increased by 10, the ratio between the new numbers so formed is 5:7. Find the original numbers.

Find the quadratic equation for :

The base of a right angled triangle is 2cm less than the perpendicular. The length of, the hypotenuse is 10 cm. Which of the following equations represents this situation?