Other Topics Puzzle – Challenge 94
Math and critical thinking challenges like this one are educational activities for practicing children’s math skills. These challenges are also a fun way for adults to test their math knowledge. For additional educational resources, . For additional educational resources
[include_netrun_products_block from-products="product/ged-math-test-prep-in-30-days-complete-study-guide-and-test-tutor-for-ged-mathematics-the-ultimate-book-for-beginners-and-pros-two-practice-tests/" product-list-class="bundle-products float-left" product-item-class="float-left" product-item-image-container-class="p-0 float-left" product-item-image-container-size="col-2" product-item-image-container-custom-style="" product-item-container-size="" product-item-add-to-cart-class="btn-accent btn-purchase-ajax" product-item-button-custom-url="{{url}}/?ajax-add-to-cart={{id}}" product-item-button-custom-url-if-not-salable="{{productUrl}} product-item-container-class="" product-item-element-order="image,title,purchase,price" product-item-title-size="" product-item-title-wrapper-size="col-10" product-item-title-tag="h3" product-item-title-class="mt-0" product-item-title-wrapper-class="float-left pr-0" product-item-price-size="" product-item-purchase-size="" product-item-purchase-wrapper-size="" product-item-price-wrapper-class="pr-0 float-left" product-item-price-wrapper-size="col-10" product-item-read-more-text="" product-item-add-to-cart-text="" product-item-add-to-cart-custom-attribute="title='Purchase this book with single click'" product-item-thumbnail-size="290-380" show-details="false" show-excerpt="false" paginate="false" lazy-load="true"]
Challenge:
There are 21 students in a class. Their Math teacher asked them this question: “How many of other students in this class have the same name as you?” The teacher asked the students to write their answers in a piece of paper. Then the teacher gathered the answers and removed repeated answers. What is the maximum number of answers that the teacher kept?
A- 0
B- 1
C- 2
D- 20
E- 21
The Absolute Best Book to Challenge Your Smart Student!

The correct answer is B.
Let’s assume that all of the students have the name John. So, to answer the questions, all of them have written 20. In this case, the teacher kept none of the answers.
If none of the students have the same name, they all answer 0. And the teacher won’t keep any answer.
Let’s assume that only one of them has a different name. Then, in this case, 20 students wrote 19 and one wrote 0. The teacher kept the last one.
The maximum number of answers that the teacher kept was one.
The Best Books to Ace Algebra
Related to This Article
More math articles
- What Does the STAAR Test Stand For?
- 7th Grade TCAP Math Worksheets: FREE & Printable
- How to Compare Fractions?
- How to Ace the SHSAT Test?
- How to Find Function Values from the Calculator
- How to Find the Number of Solutions to a System of Equations by Graphing
- The Consistent Player in Mathematics: How to Understand the Constant Rate of Change
- ACT Math Formulas
- How to Graph Radical Functions
- What’s The Best Laptop for Online Teaching?

















What people say about "Other Topics Puzzle – Challenge 94 - Effortless Math: We Help Students Learn to LOVE Mathematics"?
No one replied yet.