. The cost of a notebook •is twice the cost of a pen. Write a. linear equation in two variables to represent this sta.tement. ( Take the cost of a notebook to be r x and that of a pen to be r y).

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?