What is wrong in the below Picture?

A sundial has the fewest moving parts of any timepiece. Which has the most?

Can you replace the question mark with the correct number?

If we tell you that there is a relation between the numbers and letters in the given figure, can you analyze it and find the missing letter in the last box?

The day after tomorrow will be three days before Tuesday. Can you find out what is today?

13 decks of cards have been mixed. What is the minimum number of cards that must be taken out from the above-mixed cards to guarantee at least one 'four of a kind?

Can you find out which number multiplied by itself will give the output as 12345678987654321?

What has one letter and starts with an E?

I go up and I go down.
I go up towards the beautiful sky and down toward the green ground.
I am present tense.
I am past tense too
Children love me.

Who Am I?

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 ?