Name a key which is hardest to turn.

You order chicken wings at KFC in the boxes of 6, 9 and 20. What is the largest number of wings that you cannot obtain by buying in any combination of the boxes?

Which English verb becomes past tense just by rearranging the letters?

During which month do people sleep the least?

Who always enjoys poor health?

Can you find out which number multiplied by itself will give the output as 12345678987654321?

If I put in one canary per cage, I have one bird too many. If I put in two canaries per cage, I have one cage too many. How many cages and canaries do I have?

You are presented with three boxes. One of them has a red ball inside and the other two have a black ball inside each of them. You are asked to pick up the one with red ball and you pick one. Now, one of the other boxes is opened and it is found to have a black ball.

You are presented with a chance to change your box with the one that is left closed. Will you change your box? Why or why not?

I have Rs.50 and I spend it in the way as below.

What has to be broken before you can use it?