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

Many have heard it, but nobody has ever seen it, and it will not speak back until spoken to. What is it?

What can jump higher than a building?

Can you think of any three-dimensional shape that comprises of exactly two surfaces?

Which Travels Faster? Solve below famous picture riddle:

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?

Arrange the numbers 1, 2, 3, 4, 5, 6, 7, 8 and 9 above and below the division line in a manner that the thus formed fractions equal to 1/3.

(You can use one number only once)

I start and end with 500 and carry a 5 in my heart. But I require the first letter and the first number to be complete. I am the name of a King.

Who am I ?

Decode below three cipher riddles:

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

You have $100 with you and you have to buy 100 balls with it. 100 is the exact figure and you can't go below or above the numbers and you have to use the entire $100. If there is no kind of tax applied how many of each of the following balls will you be able to buy:

Green Balls costing $6
Yellow Balls costing $3
Black Balls costing $0.10

Now, how many of each must you buy to fulfil the condition given?