Can you count the number of quadrilaterals in the picture below?

Peter wakes up daily to pick up his cycle and crosses the border between Spain and France daily with a bag on his shoulder. He is investigated daily by the officials but they don't find anything suspicious.

If we tell you that he is smuggling something what would it be?

Can you arrange four 9's and use at most 2 math symbols, to make the total 100?

How do you go from 98 to 720 using just one letter?

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?

What can run but never walk, have a mouth that never speaks, have a head that never weeps, and have a bed but never sleeps?

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

In Greek mythology, the Sphinx sat outside of Thebes and asked this riddle of all travellers who passed by. If the traveller failed to solve the riddle, then the Sphinx killed him/her. And if the traveller answered the riddle correctly, then the Sphinx would destroy herself. The riddle:

What goes on four legs in the morning, on two legs at noon, and on three legs in the evening?

Oedipus solved the riddle, and the Sphinx destroyed herself.

You see me once in June, twice in November, and not at all in May. What am I?

The person who makes it has no need for it. He who purchases it does not use it. The person who does use it does not know they are. What is it?