How many ergs make one joule?

How many dynes make a newton?

How many newton make one kg wt.?

Let A={1,2} . Find all the functions from A to A. How many of these are one - one ?

How many segments are found in the abdomen of a cockroach?

Two persons could fit new windows in a house in 3 days. How many persons would be needed to fit the windows in one days?

How many segments are fused to make up the head of cockroach?

Where do the protonos move during ATP synthesis? How many protons move for the synthesis of one molecule of ATP?

How many ovarioles are found in an ovary of a cockroach?

How many elements are known till date?