Ms S Rao has two sons. At present her age is equal to the sum of the squares of their ages. Seventeen years hence, she will be twice her older son's age. Find the present ages of her sons if their age difference is 1 year.

What are the differences between similar triangles and congruent triangles?

What are Armstrong numbers?

All real numbers are rational numbers.

A) True

B) False

The L.C.M of the smallest 2 digit composite number and the smallest composite number is:

• (a) 12
• (b) 4
• (c) 20
• (d) 44

Are all natural numbers also whole numbers?