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

There is something which you can be arrested for attempting but not for successfully completing.

Can you think of a smallest +ve number such that if we shuffle the digits of the number, the new number becomes double the original number?

There is something which is always coming but never arrives?

What runs around the whole yard without moving?

Prove that twice of ten is the same as twice of eleven.

Make the seating arrangement of 10 children in such a way that there are 5 rows with 4 children in each row.

Find out the missing number in the picture attached:

Only one color, but not one size,
Stuck at the bottom, yet easily flies.
Present in sun, but not in rain,
Doing no harm, and feeling no pain.
What is it?

What month of the year has 28 days?