How can one talk without saying a single word?

What is the next number in the series?

15 29 56 108 208 ?

An apple seller is hosting a competition. He offers 1000 apples and 10 boxes to the people who pass by. The challenge is to put those 1000 apples in the 10 boxes in such a manner that if he asks for any amount of apples, the person can directly give him the boxes or a combination of boxes. If the person can do it, he promises to give a thousand apples for free.

If you happen to pass by the apple seller, will you be able to win a thousand apples?

Replace the question mark with the number below given a simple math problem.

The answer I give is yes, but what I mean is no. What was the question?

Can you find out which triangle will have a bigger area among the following?
1. A triangle with sides 300, 400 and 500
2. A triangle with sides 300, 400 and 700

You walk into a room that contains a match, a kerosene lamp, a candle and a fireplace. What would you light first?

What Time Should the last watch show in the below figure?

Why are all black people so quick ?

Move four matchsticks to the below square to form three squares?