Find the area of a circular ring formed by two concentric circles whose radii are 5.7 cm and 4.3 cm respectively. (Take π=3.1416 ) (A) 43.98 sq.cm(B) 53.67 sq.cm(C) 47.24 sq.cm(D) 38.54 sq.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?