The semi perimeter of a triangle having the length of its sides as 20 cm, 15 cm and 9 cm is : A.44 cm B.21 cm C.22 cm D.24 cm

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?