At present, the ratio between the age of Sharmila and Sanju is 5:7 respectively. If Sharmila is 12 years younger than Sanju, what is the total of ages of Sharmila and Sanju 4 years ago?

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?