Four bells ring at intervals of 6, 7, 8 and 9 seconds respectively. All the bells ring together after ---seconds. A.504 B.516 C.508 D.512

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?