Can you discover the missing number in this series?

37, 10, 82
29, 11, 47
96, 15, 87
42, ?, 15

Solve the rebus riddle in the picture below.

Which is heavier: a ton of bricks or a ton of feathers?

In the given figure, move three matchsticks so that the resulting figure contains two rectangles.

Decode below three cipher riddles:

26 L of the A
7 D of the W
1000 Y in a M

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

I’m tall when I’m young, and I’m short when I’m old. What am I?

All of Jacob's shoes are red except two.
All of Jacob's shoes are green except two.
All of Jacob's shoes are yellow except two.

How many shoes does Jacob have?

81 x 9 = 801. What must you do to make the this equation true?

Find a 9-digit number, which you will gradually round off starting with units, then tenth, hundred etc., until you get to the last numeral, which you do not round off. The rounding alternates (up, down, up ...). After rounding off 8 times, the final number is 500000000. The original number is commensurable by 6 and 7, all the numbers from 1 to 9 are used, and after rounding four times the sum of the not rounded numerals equals 24.