An umbrella is made by stitching 10 triangular pieces of cloth of 5 different colours each piece measuring 20 cm, 50 cm and 50 cm. How many clothes of each colour is required for one umbrella?

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?