Prime Factorization: Using factors to solve

Examples with solutions for Prime Factorization: Using factors to solve

Exercise #1

What is the number whose prime factors are: 2,3,5 2,3,5

Video Solution

Step-by-Step Solution

To solve this problem, we follow these steps:

  • Step 1: Understand that the problem specifies the number whose prime factors are 2,3, 2, \, 3, and 5 5 .
  • Step 2: Multiply these prime factors to find the number.
  • Step 3: Perform the multiplication of the numbers.

Let's carry out the calculations:
Step 1: We recognize the number must be composed of the factors 2,3, 2, 3, and 5 5 .
Step 2: Multiply 2×3=6 2 \times 3 = 6 .
Step 3: Multiply this result by 5 5 : 6×5=30 6 \times 5 = 30 .

Therefore, the number whose prime factors are 2,3, 2, 3, and 5 5 is 30 30 .

Answer

30 30

Exercise #2

What is the number whose prime factors are: 7,2 7,2

Video Solution

Step-by-Step Solution

To solve this problem, we need to find the number that corresponds to the given prime factors: 7 and 2.

Steps to solve:

  • Step 1: Identify the given prime factors, which are 2 2 and 7 7 .
  • Step 2: Multiply the prime factors together. In mathematical terms, this is expressed as:
  • 2×7=14 2 \times 7 = 14

Therefore, the solution to the problem is that the number whose prime factors are 7 and 2 is 14 14 .

The answer is clearly 14\boxed{14}, corresponding to choice (2).

Answer

14 14

Exercise #3

What is the number whose prime factors are: 5,11 5,11

Video Solution

Step-by-Step Solution

To find the number whose prime factors are 5 5 and 11 11 , we need to multiply these factors together. Let's do this step by step:

  • Multiply the prime factors: 5×11 5 \times 11 .

Performing the multiplication, we calculate:

5×11=55 5 \times 11 = 55 .

Therefore, the number whose prime factors are 5 5 and 11 11 is 55 55 .

From the choices provided, the correct answer is 55 55 , which corresponds to choice 3.

Answer

55 55

Exercise #4

What is the number whose prime factors are: 5,13 5,13

Video Solution

Step-by-Step Solution

To solve this problem, we'll follow these steps:

  • Step 1: Identify the given prime factors, which are 5 and 13.
  • Step 2: Multiply these prime factors together to find the number.

Now, let's work through each step:
Step 1: We confirm that the prime factors are 5 5 and 13 13 .

Step 2: Multiply the prime factors:
5×13=65 5 \times 13 = 65 .

Therefore, the number whose prime factors are 5 5 and 13 13 is 65 65 .

Answer

65 65

Exercise #5

What is the number whose prime factors are: 7,11,2 7,11,2

Video Solution

Step-by-Step Solution

To solve this problem, we'll follow these steps:

  • Step 1: Identify the given prime factors: 7,11, 7, 11, and 2 2 .
  • Step 2: Multiply these prime factors together to find the number.

Now, let's work through each step:

Step 1: The given prime factors are 7,11, 7, 11, and 2 2 .

Step 2: Multiply the factors together:
First, calculate 7×11=77 7 \times 11 = 77 .
Then, multiply the result by 2: 77×2=154 77 \times 2 = 154 .

Therefore, the solution to the problem is 154 154 .

Answer

154 154

Exercise #6

What is the number whose prime factors are: 5,7,5 5,7,5

Video Solution

Step-by-Step Solution

To solve this problem, we'll multiply the given prime factors 5,7, 5, 7, and 5 5 to determine the original number.

  • Step 1: Multiply the prime factors together: (5×5)×7(5 \times 5) \times 7.
  • Step 2: Calculate 5×55 \times 5, which equals 2525.
  • Step 3: Multiply the result by the remaining prime factor: 25×7=17525 \times 7 = 175.

Therefore, the solution to the problem is 175 175 .

Answer

175 175

Exercise #7

What is the number whose prime factors are: 3,2,13 3,2,13

Video Solution

Step-by-Step Solution

To solve this problem, we'll follow these steps:

  • Step 1: Multiply the first two prime factors.
  • Step 2: Multiply the result by the third prime factor.

Now, let's work through each step:
Step 1: Multiply 3 by 2:
3×2=6 3 \times 2 = 6

Step 2: Multiply the result by 13:
6×13=78 6 \times 13 = 78

Therefore, the number whose prime factors are 3, 2, and 13 is 78 78 .

Answer

78 78

Exercise #8

What is the number whose prime factors are: 19,2,3 19,2,3

Video Solution

Step-by-Step Solution

To solve this problem, we will follow these steps:

  • Step 1: Identify the given prime factors of the number, which are 19, 2, and 3.
  • Step 2: Multiply these prime factors to find the number.

Let's work through each step:

Step 1: The problem tells us the prime factors of the number are 19,2, 19, 2, and 3 3 .

Step 2: We will multiply these factors together to find the number:

19×2×3 19 \times 2 \times 3

First, multiply 19×2=38 19 \times 2 = 38 .

Next, multiply the result by 3:

38×3=114 38 \times 3 = 114

Thus, by multiplying the given prime factors, we find that the number is 114 114 .

Therefore, the solution to the problem is 114 114 .

Answer

114 114

Exercise #9

What is the number whose prime factors are: 13,2,3,5 13,2,3,5

Video Solution

Step-by-Step Solution

To find the original number from its prime factors, we need to calculate the product of the given prime numbers.

Given prime factors: 13,2,3, and 5 13, 2, 3, \text{ and } 5 .

Calculate the product:

  • First, multiply 2 2 and 3 3 :
  • 2×3=6\quad 2 \times 3 = 6
  • Next, multiply the result by 5 5 :
  • 6×5=30\quad 6 \times 5 = 30
  • Finally, multiply the result by 13 13 :
  • 30×13=390\quad 30 \times 13 = 390

Thus, the number whose prime factors are 13,2,3, 13, 2, 3, and 5 5 is 390 \mathbf{390} .

The correct choice from the given options is : 390\mathbf{390}

Answer

390 390

Exercise #10

What is the number whose prime factors are: 5,3,7,11 5,3,7,11

Video Solution

Step-by-Step Solution

To solve this problem, we need to find the number whose prime factors are provided as 5, 3, 7, and 11.

Step-by-step solution:

  • Step 1: Write down the given prime factors: 5,3,7, 5, 3, 7, and 11 11 .
  • Step 2: Obtain the product of these prime factors.

Let's perform the multiplication:

5×3=15 5 \times 3 = 15

15×7=105 15 \times 7 = 105

105×11=1155 105 \times 11 = 1155

The result of multiplying these prime factors together is 1155 1155 .

Therefore, the number whose prime factors are 5,3,7, 5, 3, 7, and 11 11 is 1155 1155 .

The correct choice among the given options is:

  • Choice 4: 1155 1155

Answer

1155 1155

Exercise #11

What is the number whose prime factors are: 2,5,11,2 2,5,11,2

Video Solution

Step-by-Step Solution

Let's tackle the problem of finding the number whose prime factors are 2,5,11, 2, 5, 11, and another 2 2 .

First, we need to understand what the problem is asking us to find. It describes a number that is completely defined by its prime factors, given by 2,5,11, 2, 5, 11, and another 2 2 . Essentially, we are tasked with determining the composite number that results from multiplying these prime factors together.

  • Step 1: Identify the given prime factors: 2,5,11, 2, 5, 11, and another 2 2 . This means we actually have 22×5×11 2^2 \times 5 \times 11 .
  • Step 2: Multiply the factors together to find the original number. We will break down the calculation for clarity:
    • First, calculate 22=4 2^2 = 4 .
    • Next, multiply this result by 5: 4×5=20 4 \times 5 = 20 .
    • Finally, multiply the previous result by 11: 20×11=220 20 \times 11 = 220 .

After performing these calculations, we find that the correct number is indeed 220.

Therefore, the solution to the problem is 220 220 .

Answer

220 220

Exercise #12

What is the number whose prime factors are: 5,13,11,7 5,13,11,7

Video Solution

Step-by-Step Solution

To determine the number with the prime factors 5 5 , 13 13 , 11 11 , and 7 7 , follow these steps:

  • Step 1: Multiply the first two prime factors: 5×13=65 5 \times 13 = 65 .
  • Step 2: Multiply the result by the next prime factor: 65×11=715 65 \times 11 = 715 .
  • Step 3: Multiply the intermediate product by the last prime factor: 715×7=5005 715 \times 7 = 5005 .

Each multiplication step ensures we have correctly included all prime factors to find the original number.

Thus, the number whose prime factors are 5 5 , 13 13 , 11 11 , and 7 7 is 5005 5005 .

Referring to the provided multiple-choice options, the correct answer is choice 2: 5005 5005 .

Answer

5005 5005