Math Magic Trick

Today Mr Tucker wanted to play a magic trick. He asked Jack to be his assistant. Mr Tucker gave Jack a yellow piece of paper and a vivid. After that Mr Tucker told Jack to go to the back of the room and write a number from 1 to 63. 

Mr Tucker told Jack to write it down on the piece of paper and not to show him. Next, Mr Tucker turned around for 5 seconds. Meanwhile Jack was showing what number he had to the class. He had the number 20. Then Mr Tucker got about 5 cards. He asked Jack which cards had his number on them. Jack had to say which ones had his number on. There were 2 cards with his number on them. 

Mr Tucker asked Lucy A to pick one of the cards that had Jack’s number on it. Mr. Tucker picked up the card that Lucy didn’t pick, he said the number was on the top row. He was right. Then he said it wasn’t on the ends. He covered up 2 numbers on each end, he was right again. 
He said it was in the middle. He covered the 2 on the ends that he wasn’t covering, he was right. Now he just had to guess which one out of the 2 was left. He chose the number 20, he was correct! 

I have no idea how he did it but I really want to see him do it again.

By Lucy G