When can we add 2 to 11 and get 1 as the correct answer?

What do you see in the given picture?

Solve this riddle by finding the odd one out from the rest.

How many pluses should we put between the digits of 987654321 to get a total of 99, and where?

Can you find out the number of the parking space in which the car is parked?

What is so fragile that saying its name breaks it?

A certain street contains 100 buildings. They are numbered from 1 to 100. How many 9's are used in these numbers?

You are given a set of weighing scales and 12 marbles. The scales are of the old balance variety. That is, a small dish hangs from each end of a rod that is balanced in the middle. The device enables you to conclude either that the contents of the dishes weigh the same or that the dish that falls lower has heavier contents than the other. The 12 marbles appear to be identical. 11 of them are identical, and one is of a different weight. Your task is to identify the unusual marble and discard it. You are allowed to use the scales three times if you wish, but no more. Note that the unusual marble may be heavier or lighter than the others. You are asked to both identify it and determine whether it is heavy or light

This puzzle is for Harry Potter fans. Do you know why Tom Riddle is called Lord Voldemort?

The day before yesterday I was 25 and the next year I will be 28. This is true only one day in a year. What day is my birthday?