What has 13 hearts but no other organs?

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?

Find the next number in the following series:
6, 14, 26, 98, __?

Count the number of triangles in the picture below:

Three men in a cafe order a meal the total cost of which is $15. They each contribute $5. The waiter takes the money to the chef who recognises the three as friends and asks the waiter to return $5 to the men.

The waiter is not only poor at mathematics but dishonest and instead of going to the trouble of splitting the $5 between the three he simply gives them $1 each and pockets the remaining $2 for himself.

Now, each of the men effectively paid $4, the total paid is therefore $12. Add the $2 in the waiters pocket and this comes to $14. Where has the other $1 gone from the original $15?

In case you were starting to feel confident, this one was meant for third graders in Vietnam. The answer is 66, but we don't blame you for scratching your head about how they got there.

What do you see in the image below

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?

Do you know of a place where the wind blows south and then suddenly shifts direction towards the north?

Count the Triangle in the figure given below: