MTG foundation vs rd sharma comparison for all std from 8th to 10th which is better for to understand concepts deeply and which one do u think is best for foundation for jee?

Don't suggest arihant to me plz.

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?