What is the next number in the series?

15 29 56 108 208 ?

When it is alive we sing, when it is dead we clap our hands. What is it?

Can you find the missing letter in the sequence?
S - T - I - L - ? - T - F - Y - C

A man and a dog were going down the street. The man rode, yet walked. What was the dog’s name?

Can you spot the hidden girl in the picture below?

There are three boxes. One is labeled "APPLES" another is labeled "ORANGES". The last one is labeled "APPLES AND ORANGES". You know that each is labeled incorrectly. You may ask me to pick one fruit from one box which you choose.

How can you label the boxes correctly?

A worker is to perform work for you for seven straight days. In return for his work, you will pay him 1/7th of a bar of gold per day. The worker requires a daily payment of 1/7th of the bar of gold. What and where are the fewest number of cuts to the bar of gold that will allow you to pay him 1/7th each day?

What occurs twice in a week, once in a year but never in a day?

What animal walks on four legs in the morning, two legs during the day, and three legs in the evening?

Oedipus, the king of Thebes, figured out the answer to the riddle:

It has horns but can’t beep. It is like to bleat but It is not a sheep. What is it?