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

A boy was at a carnival and went to a booth where a man said to the boy, "If I write your exact weight on this piece of paper then you have to give me $50, but if I cannot, I will pay you $50." The boy looked around and saw no scale so he agrees, thinking no matter what the carny writes he'll just say he weighs more or less. In the end the boy ended up paying the man $50. How did the man win the bet?

Complete the series by replacing "?" with the correct number.

ST ND RD TH '?'

If you're 8 feet away from a door and with each move you advance half the distance to the door. How many moves will it take to reach the door?

You may enter, but you may not come in. I have space, but no room. I have keys, but open no lock. What am I?

What does this rebus puzzle means ?

John Went to the nearby store in a Mall to buy something for her home. Below is the conversation between the two:

John: How much for the one?
Shopkeeper: It is $2
John: How much for the Eleven?
Shopkeeper: It is $4
John: How much for the Hundred?
Shopkeeper: It is $6.

What is John buying?

They came out at night, without being called.
They lost at day, without being stolen.
Who are they?

I am green and found in the forest and have needles instead of leaves. What am I?
Hint 1: It can be used for Christmas decorations.
Hint 2: I have a strong, scent that is used in air fresheners.

You are given four results as below:
1111 = F
2222 = E
3333 = T
Then, can you find out how to code 4444?