I am a normal creature, but I have five hands. I can even have more but even then I will be considered normal.

Who am I?

It's a protector.
It sits on a bridge.
One individual can see directly through it, while others wonder what it hides.

What is it?

An octopus has 8 legs. A hippogriff has 6 legs and 2 pairs of wings. A sphinx has 6 legs and one pair of wings. Now we have all 3 kinds and a total of 18 insects in a cage. We have a total of 118 legs and 20 pairs of wings. How many insects do we have of each kind?

What is the largest number you can write with just 3 digits?

If,

A + B = C
D - C = A
E - B = C

Based on the above equations, find out the answer for:

D + F = ?

I have cities, but no houses. I have mountains, but no trees. I have water, but no fish. What am I?

How will you measure 15 minutes using two hourglasses of 7 minutes and 11 minutes respectively?

Assume there are approximately 5,000,000,000 (5 billion) people on Earth. What would you estimate to be the result, if you multiply together the number of fingers on every person's left hand? (For the purposes of this exercise, thumbs count as fingers, for five fingers per hand.) If you cannot estimate the number then try to guess how long the number would be.

I have eight fingers and two thumbs but I do not live. What Am I?

What has a ring but no finger?