500 persons are taking a dip into a cuboidal pond which is 80m long and 50m broad. Find the rise of water level in the pond in millimetres, if the average displacement of water by a person is 0.04m3.

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?