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.

Other Topics Puzzle – Challenge 94

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!

$11.99
Satisfied 123 Students

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

$14.99
Satisfied 1 Students
$14.99
Satisfied 92 Students
$15.99
Satisfied 125 Students

Related to This Article

What people say about "Other Topics Puzzle – Challenge 94 - Effortless Math: We Help Students Learn to LOVE Mathematics"?

No one replied yet.

Leave a Reply

X
45% OFF

Limited time only!

Save Over 45%

Take It Now!

SAVE $40

It was $89.99 now it is $49.99

The Ultimate Algebra Bundle: From Pre-Algebra to Algebra II