Can you identify the hidden rebus in the image below?

Place a mathematical symbol between the numerals 5 and 9 in such a way that the resulting number is greater than 5 but smaller than 9.

I am a prime number.
The double of myself is equal to the square of me.

which number am I?

Which Travels Faster? Solve below famous picture riddle:

A king sentenced a man to the death sentence for some crime he had committed. Known for his kindness, the king told the culprit that he had a choice to die in a way he decides.

The culprit was clever and said something that saved him from death. What method do you think he must have chosen for his death?

Which country gets ill every time?

A maths symbol is hidden in the below Bar Graph. Can you decipher it?

What is harder to catch the faster you run?

If,
29 - 1 = 30
9 - 1 = 10
14 - 1 = 15

Based on similar logic, Can you prove that the below algebraic equation is true?
11 - 1 = 10 ?

When I got four, I have it none.
When I got two, I have it some.
When I got none, I have it all.

What is it?