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.
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
- 4th Grade NYSE Math FREE Sample Practice Questions
- Algebra Puzzle – Critical Thinking 12
- What Is the Best Calculator for Geometry?
- Number Properties Puzzle – Challenge 18
- Perimeters and Areas of Squares
- How to Solve Logarithmic Equations: Definition and Properties
- How to Graph Box Plot?
- 3rd Grade NYSE Math Worksheets: FREE & Printable
- What Skills Do I Need for the ALEKS Math Test?
- Algebra Puzzle – Challenge 50
What people say about "Other Topics Puzzle – Challenge 94 - Effortless Math: We Help Students Learn to LOVE Mathematics"?
No one replied yet.