What is the next number in the series?

15 29 56 108 208 ?

If,

A + B = C
D - C = A
E - B = C

Based on the above equations, find out the answer for:

D + F = ?

what does this picture(rebus) riddle means ?

There are three boxes on a table. One of the box contains Gold and the other two are empty. A printed message contains in each box. One of the message is true and the other two are lies.

The first box says "The Gold is not here".

The Second box says "The Gold is not here".

The Third box says "The Gold is in the Second box".

Which box has the Gold?

John can fit six large chocolate boxes or nine small chocolate boxes into a carton. How many cartons will he require to put sixty-six chocolate boxes into?

A mathematician couple was having a Frappuccino in Starbucks sitting opposite to each other. Suddenly the guy noticed the text written on the paper in front of them and exclaimed that it was wrong. The girl denied it and said it is appropriate. Both are correct. What is written on the paper?

Your mother’s brother’s only brother-in-law is asleep on your couch. Who is asleep on your couch?

Using Only Five 5's and any mathematical operator make sum as 37

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?

Name one eight-letter word with 'kst' in the middle, 'in' the beginning, 'and' at the end.?