Finding the Possible Values of a and b

Oct 13, 2025 by wbrum.org 31 views

Introduction

Mathematics is a fascinating subject that involves problem-solving, critical thinking, and logical reasoning. In this article, we will delve into a mathematical problem that involves a two-digit number, where the sum of the digits is 8, and the difference between the number and the number with the digits reversed is 54. We will explore the solution to this problem and provide a step-by-step explanation of how to arrive at the answer.

Understanding the Problem

Let's break down the problem and understand what is being asked. We have a two-digit number, which can be represented as 10a + b, where 'a' is the tens digit and 'b' is the units digit. The sum of the digits is 8, which means a + b = 8. Additionally, the difference between the number and the number with the digits reversed is 54. The number with the digits reversed is 10b + a.

Setting Up the Equation

To solve this problem, we need to set up an equation based on the given information. The difference between the number and the number with the digits reversed is 54, which can be represented as (10a + b) - (10b + a) = 54. Simplifying this equation, we get 9a - 9b = 54.

Simplifying the Equation

We can simplify the equation further by dividing both sides by 9, which gives us a - b = 6. This equation represents the difference between the tens digit and the units digit.

Finding the Possible Values of a and b

Since the sum of the digits is 8, we know that a + b = 8. We can use this equation to find the possible values of a and b. By substituting a = 6 + b into the equation a + b = 8, we get (6 + b) + b = 8. Simplifying this equation, we get 2b = 2, which means b = 1.

Finding the Value of a

Now that we have found the value of b, we can find the value of a. Since a + b = 8, we can substitute b = 1 into this equation to get a + 1 = 8. Solving for a, we get a = 7.

Verifying the Solution

To verify our solution, we need to check if the difference between the number and the number with the digits reversed is indeed 54. The number is 71, and the number with the digits reversed is 17. The difference between these two numbers is 71 - 17 = 54, which confirms that our solution is correct.

Conclusion

In this article, we have solved a mathematical problem that involves a two-digit number, where the sum of the digits is 8, and the difference between the number and the number with the digits reversed is 54. We have used algebraic equations to find the possible values of the tens digit and the units digit and have verified our solution by checking if the difference between the number and the number with the digits reversed is indeed 54. This problem requires critical thinking, logical reasoning, and problem-solving skills, making it an excellent example of a mathematical puzzle.

Frequently Asked Questions

What is the sum of the digits in the two-digit number? The sum of the digits in the two-digit number is 8.
What is the difference between the number and the number with the digits reversed? The difference between the number and the number with the digits reversed is 54.
How do we find the possible values of the tens digit and the units digit? We use algebraic equations to find the possible values of the tens digit and the units digit.
How do we verify our solution? We verify our solution by checking if the difference between the number and the number with the digits reversed is indeed 54.

Step-by-Step Solution

Let's represent the two-digit number as 10a + b, where 'a' is the tens digit and 'b' is the units digit.
The sum of the digits is 8, which means a + b = 8.
The difference between the number and the number with the digits reversed is 54, which can be represented as (10a + b) - (10b + a) = 54.
Simplifying this equation, we get 9a - 9b = 54.
Dividing both sides by 9, we get a - b = 6.
Since the sum of the digits is 8, we know that a + b = 8.
By substituting a = 6 + b into the equation a + b = 8, we get (6 + b) + b = 8.
Simplifying this equation, we get 2b = 2, which means b = 1.
Now that we have found the value of b, we can find the value of a. Since a + b = 8, we can substitute b = 1 into this equation to get a + 1 = 8.
Solving for a, we get a = 7.
To verify our solution, we need to check if the difference between the number and the number with the digits reversed is indeed 54. The number is 71, and the number with the digits reversed is 17. The difference between these two numbers is 71 - 17 = 54, which confirms that our solution is correct.

Tips and Tricks

When solving mathematical problems, it's essential to read the problem carefully and understand what is being asked.
Use algebraic equations to represent the problem and solve for the unknown variables.
Verify your solution by checking if it satisfies the given conditions.
Practice solving mathematical problems to improve your critical thinking and problem-solving skills.

Conclusion

Introduction

In our previous article, we solved a mathematical problem that involved a two-digit number, where the sum of the digits is 8, and the difference between the number and the number with the digits reversed is 54. In this article, we will answer some frequently asked questions (FAQs) about this problem.

Q&A

Q: What is the sum of the digits in the two-digit number?

A: The sum of the digits in the two-digit number is 8.

Q: What is the difference between the number and the number with the digits reversed?

A: The difference between the number and the number with the digits reversed is 54.

Q: How do we find the possible values of the tens digit and the units digit?

A: We use algebraic equations to find the possible values of the tens digit and the units digit.

Q: How do we verify our solution?

A: We verify our solution by checking if the difference between the number and the number with the digits reversed is indeed 54.

Q: What is the number with the digits reversed?

A: The number with the digits reversed is 17.

Q: What is the difference between the number and the number with the digits reversed?

A: The difference between the number and the number with the digits reversed is 54.

Q: How do we solve this problem?

A: We use algebraic equations to represent the problem and solve for the unknown variables.

Q: What is the value of the tens digit?

A: The value of the tens digit is 7.

Q: What is the value of the units digit?

A: The value of the units digit is 1.

Q: How do we check if our solution is correct?

A: We check if our solution satisfies the given conditions, such as the sum of the digits being 8 and the difference between the number and the number with the digits reversed being 54.

Q: What is the importance of this problem?

A: This problem is important because it requires critical thinking, logical reasoning, and problem-solving skills.

Q: How can we apply this problem to real-life situations?

A: We can apply this problem to real-life situations by using algebraic equations to represent problems and solve for the unknown variables.

Q: What are some tips and tricks for solving this problem?

A: Some tips and tricks for solving this problem include reading the problem carefully, using algebraic equations to represent the problem, and verifying the solution by checking if it satisfies the given conditions.

Conclusion

In this article, we have answered some frequently asked questions (FAQs) about the two-digit number problem. We have provided detailed explanations and examples to help readers understand the problem and its solution. We hope that this article has been helpful in clarifying any doubts or questions that readers may have had about the problem.

Tips and Tricks

When solving mathematical problems, it's essential to read the problem carefully and understand what is being asked.
Use algebraic equations to represent the problem and solve for the unknown variables.
Verify your solution by checking if it satisfies the given conditions.
Practice solving mathematical problems to improve your critical thinking and problem-solving skills.