You may enter, but you may not come in. I have space, but no room. I have keys, but open no lock. What am I?

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

Which tank will fill first?

One absent-minded ancient philosopher forgot to wind up his only clock in the house. He had no radio, TV, telephone, internet, or any other means for telling time. So he travelled on foot to his friend's place a few miles down the straight desert road. He stayed at his friend's house for the night and when he came back home, he knew how to set his clock. How did he know?

Which is Odd One Out and why?

4377

3954

9862

8454

9831

John named his first son Alpha, second Beta, third Charlie and fourth Delta. What is the fifth son's name?

What seven-letter word has hundreds of letters in it?

Find the value of "?" in the ball picture Riddle below:

John was gifted a new Hayabusa. He drove x miles at 55mph. Then he drove x+20 miles at 40mps. He drove his bike for 100 minutes. How much distance did he travel?

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?