Puzzle Set 002



1. Brothers and sisters have I none, but that man's father is my father's son. Who is that man?

2. What is the simplest way in which two people can be an uncle to each other?

3. A certain family party consisted of 1 grandfather, 1 grandmother, 2 fathers, 2 mothers, 4 children, 3 grandchildren, 1 brother, 2 sisters, 2 sons, 2 daughters, 1 father-in-law, 1 mother-in-law, and 1 daughter-in-law. Twenty-three people, you will say. No; there were only seven persons present. Can you show how this might be?

4. My grandson is about as many days as my son is weeks, and my grandson is as many months as I am in years. My grandson, my son and I together are 100 years. Can you tell me my age in years?

5. 1, 11, 21, 1211, 1231, 131221, 132231...
What is next number in the series?

6. Suppose your friend suggests this game: You will both flip a coin. When both of you get heads, he will give you 2 jelly beans, but if you do not get two heads, you agree to give him 1 jelly bean. Who is probably going to end up winning more jelly beans and roughly at what rate?

7. A bag contains one ball known to be either black or white. A black ball is put in, the bag is shaken, and a ball is drawn out, which is black. What is the chance of the remaining ball being black?


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