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
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
- Best Blue Light Glasses for Teachers and Students
- Algebra Puzzle – Challenge 39
- How to Use Area Models and the Distributive Property to Multiply?
- How to Find the Surface Area of Pyramid?
- ATI TEAS 7 Math FREE Sample Practice Questions
- CBEST Math-Test Day Tips
- How Mathematical Thinking Transforms Your View of Life
- How to Prepare for the ParaPro Math Test?
- How to Find Independent and Dependent Variables in Tables and Graphs?
- Top 10 CLEP College Algebra Practice Questions
What people say about "Other Topics Puzzle – Challenge 94 - Effortless Math: We Help Students Learn to LOVE Mathematics"?
No one replied yet.