Why is 6 afraid of 7?

If it took eight men ten hours to build a wall, how long would it take four men to build it?

A cat had three kittens: Snophy, Topsy and Jorden. What was the mother's name?

You along with your friend are standing in front of two houses. Each of those houses inhabits a family with two children.

Your friend tells you the below two facts:
1) On your left is a family that has a boy who likes accounts but the other child loves science.
2) On the right is a family with a seven-year-old boy and a newborn baby.

You ask him, "Does either of the family have a girl?"

To this, he replies, "I am not quite sure. But can you guess that? If you are right, I will give you $500."

Which family do you think is likely to have a girl?

When you stop to look, you can always see me. But if you try to touch me, you can never feel me. Although you walk towards me, I remain the same distance from you. What am I?

What is the longest word in the dictionary?

How many times can you subtract the number two from the number fifty?

There is a box full of marbles,
all but two are blue,
all but two are green,
and all but two are red.

How many marbles are in the box?

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?

Solve the puzzle by telling what does below picture means.