What does the following represent?

N N N N N N N

A A A A A A A

C C C C C C C

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 ?

I have feet, but no legs. Which animal Am I?

Look at the below sequence of letters and tell us what the next letter should be:

O T T F F S S ?

Can you identify the hidden rebus in the image below?

The square root of number 121 is "11". What is the square root of the number "12345678987654321."?

Count the number of triangles in the picture below:

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

Can you write down eight eights so that they add up to one thousand?

I throw two dice simultaneously.

What is the probability of getting a sum as 9 of the two numbers shown?