A well of diameter 150 cm has a stone parapet around it. If the length of the outer edge of the parapet is 660cm, then the width of the parapet is: (a) 30cm (b) 20cm (c) 25cm (d) 40cm

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?