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

In the following picture, E is going to slide the object down and as per the terrain and the physics, the round object is going to travel all the way till the end. Now, can you analyze who all people will die when it happens?

What is at the end of a rainbow?

What's a single-digit number with no value?

The more of this there is, the less you see. What is it?

Three men in a cafe order a meal the total cost of which is $15. They each contribute $5. The waiter takes the money to the chef who recognises the three as friends and asks the waiter to return $5 to the men.

The waiter is not only poor at mathematics but dishonest and instead of going to the trouble of splitting the $5 between the three he simply gives them $1 each and pockets the remaining $2 for himself.

Now, each of the men effectively paid $4, the total paid is therefore $12. Add the $2 in the waiters pocket and this comes to $14. Where has the other $1 gone from the original $15?

An exterior architect is asked by a builder to plant seven trees in a manner that there are exactly six rows of trees in a straight line and each row has three trees in particular.

How will he do it?

When you say goodbye, I am what you need to tie.
I come as a couple and go wherever you run.
Who am I?

Who is that with a neck and no head, two arms and no hands? What is it?

If eleven plus two equals one, what does nine plus five equal?