The age of Sachin before Y years was X years, then his age after 4 years will be _______ years. A. X+Y+4 B. X−Y−4 C. Y−X+4 D. X−Y+4

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?