The hollow metal pipe is 63 cm long. The inner diameter of cross-section is 4 cm and the outer diameter is 4.8 cm. Find the total surface area of the pipe.

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?