What Deficiency does the below rebus represent?

VIT_MIN

Our product and our sum always give the same answer. Who are we?

Why is 6 afraid of 7?

If you had a pizza with crust thickness 'a' and radius 'z', what's the volume of the pizza?

Can you convert the number zero(0) into a positive number using just one mathematical operator ?

A large water tank has two inlet pipes (a large one and a small one) and one outlet pipe. It takes 3 hours to fill the tank with the large inlet pipe. On the other hand, it takes 6 hours to fill the tank with the small inlet pipe. The outlet pipe allows the full tank to be emptied in 9 hours.

What fraction of the tank (initially empty) will be filled in 0.64 hours if all three pipes are in operation? Give your answer to two decimal places (e.g., 0.25, 0.5, or 0.75).

Two girls were born to the same mother, on the same day, at the same time, in the same month and year and yet they're not twins. How can this be ?

Why 1729 is a magic number? Answer Logically.

I can sizzle like bacon,
I am made with an egg,
I have plenty of backbone, but lack a good leg,
I peel layers like onions, but still remain whole,
I can be long, like a flagpole, yet fit in a hole.

Can you make a six-letter word using the letters N, A and B ?