Find the expansion of (2a−3b)3 : (a) 8a3−27b3−36a2b−54ab2 (b) 8a3+27b3−36a2b+54ab2 (c) 8a3−27b3+36a2b+54ab2 (d) 8a3−27b3−36a2b+54ab2

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?