If 1+9+8=1, what is 2+8+9?

I was speeding and ran through a stop sign, yet two traffic officers who were there do nothing about it.

why?

How many people must be gathered together in a room, before you can be certain that there is a greater than 50/50 chance that at least two of them have the same birthday?

You have 10 balls with you. A friend of yours out of nowhere asks you to place those ten balls in five lines such that each of the lines has exactly 4 balls on them. He needs to check your intelligence. Prove him by doing the task.

You have four chains. Each chain has three links in it. Although it is difficult to cut the links, you wish to make a single loop with all 12 links. What is the fewest number of cuts you must make to accomplish this task?

Can you find the missing number in the third row?
35 20 14
27 12 18
5 2 ?

Below the four parts have been reorganised. The four partitions are exactly the same in both arrangements. Why is there a hole?

Which part of London exists in France as well ?

The ages of a father and son add up to 66.
The father's age is the son's age reversed.
How old could they be?
(3 possible solutions).

John left on a horse on Thursday , was gone for two days, and came back on Thursday after completing his work. How did that happen?