The tens digit of a two digit number exceed the unit digits by 5. If the digits are reversed, the new number is less by 45. If the sum of digits is 9. Find the numbers.

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?