How can you take 2 from 5 and leave 4?

Can you place six X (crosses) in below board without making three in a row in any way ?

Quickly Solve this riddle

7 - 4 + 3 * 0 + 1 = ?

There is a five-letter word which has 3 consonants(all are same) and 2 different vowels.
Also, something wrong is associated with the word.

Can you name it?

What number should come in place of the question mark below?

Here is what you have to do. You have to throw a ball as hard as you can but it must return back to you even if it does not bounce at anything. Also, you have nothing attached to the ball. There is no one on the other end to catch that ball and throw it back at you.

How will you do it?

A mules travels the same distance daily.
I noticed that two of his legs travels 10km and the remaining two travels 12km.
Obviously two mules legs cannot be a 2km ahead of the other 2.

The mules is perfectly normal. So how come this be true ?

Find the next number in the series?
2, 12, 36, 80, 150, 252, 392, _ ?

Replace the question mark with the correct number.

2 + 2= 4
3 + 3= 18
4 + 4= 48
5 + 5= ?

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