two circles of equal radii cut each other at P and Q, so that the centre of one lies on the other. A straight line through P cuts the circle again at A and B. Prove that ΔQAB is an equilateral trianagle .

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?