Three doctors said that Bill was their brother. Bill says he has no brothers. How many brothers does Bill actually have?

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

What part of the chicken has the most feathers?

A man looks at a painting in a museum and says, “Brothers and sisters I have none, but that man’s father is my father’s son.” Who is in the painting?

Find out the missing number in the picture attached:

Take away my first letter, then take away my second letter. Then take away the rest of my letters, yet I remain the same. What am I?

Solve the counting riddle by identifying the number of triangles in the given picture.

If you’ve got me, you want to share me; if you share me, you haven’t kept me. What am I?

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.

What is the unique property of the following words ?
* Revive
* Banana
* Grammar
* Voodoo
* Assess
* Potato
* Dresser
* Uneven