Mr. R.’s World of Math

Chapter 5.1

Well, now the students had enough money to pay the elevator operator…of course that was only enough money if the elevator operator wasn’t smart enough to know that Mr. R’s plastic money was fake.
     “What do we do now?” asked Hannah.
     “I guess we press the elevator button,” said David, “the problem is that I don’t see an elevator button…”
     “It’s totally right here,” said Hannah who found the button, “should we press it?”
     Cocoa shook her head up and down as she said, “ess it, ess it”
     “What in the world does ‘ess it’ mean?” asked Greg.
     “I don’t know,” said Serena, “I figure it might be guinea-pig language.”
Cocoa picked up a pad and a pencil and wrote down the following:

   I’m saying ‘press it press it.’ Have any of you ever tried to speak with an elevator in your mouth!?

    “Oh, why didn’t you say so in the first place?” said David.
    “I id day so!” yelled Cocoa. (authors translation- I did say so…)

So Hannah rushed up to where the elevator button was and said,
     “OK, like here goes totally nothing,” and she pressed the little button on the outside of the elevator.
     After she pressed the button there was a sound. It was a terrible sound, a grinding, grating, squeaking sound. It was the sound of the elevator door starting to open. But before it could open all the way it stopped moving and a little sign popped up that said:

To open this elevator door the rest of the way, you must push the elevator button a certain number of times.

If you push it too many or too few times, the door will close again and you will be stuck in this vaporizing classroom…

The next number in the pattern below will tell you the correct number of times you should press the elevator button.

2, 3, 5, 9, 17, __

 

What should the next number in this pattern be?

Enter the number here:

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