The /1,oor of a rectangular hall has a perimeter 250 m. If the cost of painting the four walls at the rate of f 10 per m2 is f 15000, find the height of the hall. [Hint: Area of the four walls = Lateral surface area.]

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?