Two persons 27km apart, starting at the same time meet each other in 9 hours, if they walk in the same direction and 3 hours if they walk in opposite directions. Find their speed of walking.

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?