Find the area of a ring whose outer and inner radii are 19 cm and 16 cm respectively. A. 330 cm2 B. 310 cm2 C. 320 cm2 D. 350 cm2

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?