What mathematical symbol can be put between 5 and 9, to get a number bigger than 5 and smaller than 9?

The horse jumps over the king.
Strangely there is absolutely no scratch on him.

Can anyone explain, how is this possible?

They do not possess flesh or feathers or scales or bone
But still, they are blessed with fingers and thumbs of their own.

If,

A + B = C
D - C = A
E - B = C

Based on the above equations, find out the answer for:

D + F = ?

Complete the following series. It.s very logical:

1, 4, 5, 6, 7, 9, 11, __?

Can you arrange four 9's and use at most 2 math symbols, to make the total 100?

If you were to put a coin into an empty bottle and then insert a cork into the neck, how could you remove the coin without taking out the cork or breaking the bottle?

Can you make a six-letter word using the letters N, A and B ?

You need to move three matchsticks to form three squares. Can you do it?

Can you find the least possible number such that

If the number is divided by 3, it gives the remainder of 1;
If the number is divided by 4, it gives the remainder of 2;
If the number is divided by 5, it gives the remainder of 3;
If the number is divided by 6, it gives the remainder of 4.