The ages of the younger and elder brothers are in the ratio of 2:3. If the younger was 6 years older and the elder 5 years younger, the age of the younger would have been thrice the age of the elder. Find their present ages.

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?