Fun Esti-Mystery Challenge: Guess the Number of Earplugs!

“Earplugs”
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Steve Wyborney
A local store recently finished a construction project.  As I was walking through the store, I saw
several brand new, unopened boxes of earplugs for sale.  I wondered if they were extra items
that had been intended for use during the project. When I saw them, I realized they would be
perfect for making Esti-Mysteries.  So I purchased several boxes.  They may have wondered why
somebody needed so many earplugs.
As the clues appear, use the
information to narrow the
possibilities to a smaller set.  After
each clue, use estimation again to
determine which of the remaining
answers is the most reasonable.
How many earplugs
are in the bowl?
Write down your first estimate.
After each clue, you’ll see if your
estimate is still a possibility.  After
each clue, if it is no longer possible
write down a new estimate – and
be prepared to explain why you
chose it.
www.stevewyborney.com
Steve Wyborney
Clue #1
Clue #2
Clue #3
Clue #4
Clue #1
Count by tens from 10 to 50.  The
answer is one of those numbers.
Clue #2
The digit 1 is not in the answer.
Clue #3
The digit 3 is not in the answer.
Clue #4
The digit 5 is not in the answer.
www.stevewyborney.com
Steve Wyborney
After seeing the clues, you have
narrowed the possibilities to a
small set of numbers.  Before you
see the answer, select your final
estimate.  Write it down, and
explain to someone why you chose
that number.
www.stevewyborney.com
Steve Wyborney
40 earplugs
The Reveal
Click to see the answer.
Important Note:
If you can see this box, then the slide show is
not playing and the reveal won’t work.
Here is the solution:
If you are using PowerPoint, click on Slide
Show, then click on From Beginning.
If you are using Google Slides, click on View
then Present.
www.stevewyborney.com
Steve Wyborney
 
80 Cube Conversations
Lessons
 
The Original
50 Splat! Lessons
 
The Original
20 Fraction
Splat! Lessons
 
More Free, Downloadable Resources From Blog Posts
 
20 Days of
Number Sense
& Rich Math Talk
 
The Original 40
Estimation Clipboard
Sets
 
51 Esti-Mysteries
 
To Access The Multiplication Course…
 
1.
Click 
here
 
to see the chapter playlists on my YouTube channel.
2.
Click on “sort by” (on the right side) and choose 
Date created (oldest)
3.
You’ll see all 12 chapters in the course.
 
Tips for Using the Multiplication Course
 
When looking at playlists, click on the words “View Full Playlist” instead of the
thumbnail or the chapter title.
Then click on the share button.
Copy the link and send it to your class.
Begin with 1 lesson (1 video) per day and then adjust the pacing to meet the
needs of your class.
 
For more information read the blog post about The Multiplication Course 
here
.
 
November  1 – January 8
 
Part 2 - New Esti-Mysteries and 
Number Sense
Resources Every 
Day for the Rest 
of the School Year
 
January 11 – February 26
 
New Esti-Mysteries and 
Number Sense Resources
Every 
Day for the Rest 
of the School Year
 
March 1 – April 16
 
Part 3 - New Esti-Mysteries and Number Sense
Resources Every Day for the Rest of the School Year
 
April 19 – May 28
 
Part 4 - New Esti-Mysteries and Number Sense
Resources Every Day for the Rest of the School Year
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Explore a puzzling Esti-Mystery challenge where you need to guess the number of earplugs in the bowl by deciphering clues that eliminate possibilities. Sharpen your estimation skills and enjoy the thrill of narrowing down the options to reveal the answer of 40 earplugs! Have fun with number sense and logical reasoning in this engaging activity.


Uploaded on Jul 29, 2024 | 0 Views


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  1. A local store recently finished a construction project. As I was walking through the store, I saw several brand new, unopened boxes of earplugs for sale. I wondered if they were extra items that had been intended for use during the project. When I saw them, I realized they would be perfect for making Esti-Mysteries. So I purchased several boxes. They may have wondered why somebody needed so many earplugs. Earplugs Important Note: If you can see this box, then the slide show is not playing and the reveal won t work. Here is the solution: If you are using PowerPoint, click on Slide Show, then click on From Current Slide. If you are using Google Slides, click on View then Present. Steve Wyborney www.stevewyborney.com

  2. How many earplugs are in the bowl? As the clues appear, use the information to narrow the possibilities to a smaller set. After each clue, use estimation again to determine which of the remaining answers is the most reasonable. Write down your first estimate. After each clue, you ll see if your estimate is still a possibility. After each clue, if it is no longer possible write down a new estimate and be prepared to explain why you chose it. Steve Wyborney www.stevewyborney.com

  3. Clue #1 Clue #1 Count by tens from 10 to 50. The answer is one of those numbers. Clue #2 Clue #2 The digit 1 is not in the answer. Clue #3 Clue #3 The digit 3 is not in the answer. Clue #4 Clue #4 The digit 5 is not in the answer. 10 20 30 40 50 10 20 30 40 50 10 20 30 40 50 10 20 30 40 50 Steve Wyborney www.stevewyborney.com

  4. After seeing the clues, you have narrowed the possibilities to a small set of numbers. Before you see the answer, select your final estimate. Write it down, and explain to someone why you chose that number. Steve Wyborney www.stevewyborney.com

  5. The Reveal 40 earplugs Click to see the answer. Important Note: If you can see this box, then the slide show is not playing and the reveal won t work. Here is the solution: If you are using PowerPoint, click on Slide Show, then click on From Beginning. If you are using Google Slides, click on View then Present. Steve Wyborney www.stevewyborney.com

  6. Part 3 - New Esti-Mysteries and Number Sense Resources Every Day for the Rest of the School Year Part 4 - New Esti-Mysteries and Number Sense Resources Every Day for the Rest of the School Year New Esti-Mysteries and Number Sense Resources Every Day for the Rest of the School Year Part 2 - New Esti-Mysteries and Number Sense Resources Every Day for the Rest of the School Year C:\Users\Steve Wyborney\Desktop\STEVES Esti-Mystery Clue Toolkit and Templates FALL 2020.jpg C:\Users\Steve Wyborney\Desktop\Blog Post Pics and email too\Clipboard Dice.jpg C:\Users\Steve Wyborney\Desktop\Blog Post Pics and email too\Part 3 Feature Pic.jpg November 1 January 8 January 11 February 26 March 1 April 16 April 19 May 28 More Free, Downloadable Resources From Blog Posts C:\Users\Steve Wyborney\Desktop\20 Days Title Pic.jpg C:\Users\Steve Wyborney\Desktop\SPLAT blog post folder\Splat Promo Images and GIFs\Splat Level 3 B.jpg C:\Users\Steve Wyborney\Desktop\Splat Promos HUGE SET\Slide6.JPG C:\Users\Steve Wyborney\Desktop\Presentation1.jpg C:\Users\Steve Wyborney\Desktop\8.8.2018 Desktop\Estimation Clipboard Desktop Materials\Bundle 1 Glasses Pic.jpg 20 Days of Number Sense Rich Math Talk 51 Esti-Mysteries The Original 50 Splat! Lessons 20 Days of Number Sense & Rich Math Talk 51 Esti-Mysteries The Original 20 Fraction Splat! Lessons 80 Cube Conversations Lessons The Original 40 Estimation Clipboard Sets To Access The Multiplication Course Click here to see the chapter playlists on my YouTube channel. Click on sort by (on the right side) and choose Date created (oldest) You ll see all 12 chapters in the course. 1. 2. 3. Tips for Using the Multiplication Course When looking at playlists, click on the words View Full Playlist instead of the thumbnail or the chapter title. Then click on the share button. Copy the link and send it to your class. Begin with 1 lesson (1 video) per day and then adjust the pacing to meet the needs of your class. For more information read the blog post about The Multiplication Course here.

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