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

In a university, a professor gave a set of three problems to the three brilliant students of his class. See the image for the questions.

I went to the bookshop and spent one-half of the money that was in my purse.

When I came out, I found that I had as many cents as I had dollars and half as many dollars as I had cents when I went in. Find the money in my purse when I entered the store.

Baseball bat and ball cost $100. If the bat cost $99 more than the ball, what is the cost of each?

What is the word or phrase?

What two things can you never eat for breakfast?

If you read clockwise, you can form a word by inserting three missing letters in the picture given below. Can you do it?

What word begins and ends with an E, but has only one letter?

A man is shown a portrait painting. He looks closely, then tells, “Brothers and sisters have I none, but that man’s father is my father’s son!” Who is the man in the portrait?

Consider all the numbers between 1 and 1 million. Among all these numbers, there is something very special about the number 8 and the number 2202. What is it?