a submarine goes 30 km upstream and 44 km downstream in 10 hrs it can also go 40 km up stream and 55 km down stream in 13 hrs find the speed of the boat in still water and speed of stream

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?