The mean of 100 observations is 50. If one of the observations which was 50 is replaced by 150 the resulting mean will be (A) 51 (B) 52 (C) 51.5 (D) 53

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?