Find the cube root of the following number by prime factorization method: $10648$
Answer
659.4k+ views
Hint: Prime factorization is the process of finding which prime numbers can be multiplied together to make the original number, where prime numbers are the numbers greater than $1$ and which are not the product of any two smaller natural numbers. For Example: $2,{\text{ 3, 5, 7,}}......$ $2$ is the prime number as it can have only $1$ factor. Factors are the number $1$and the number itself. Cube root of any number is the factor which is multiplied with it- self three times.
Complete step by step answer:
To find the prime factorisation, start dividing the given number $10648$by the first prime number,$2$ Continue division until it is not divisible by$2$. Gradually start dividing by $3,{\text{ 5, 7, 11, 13,}}....$
Let’s start dividing the given number $10648$by $2$
$
10648 \div 2 = 5324 \\
5324 \div 2 = 2662 \\
2662 \div 2 = 1331 \\
1331 \div 2 = 665.5 \\
$
So, $1331$ is further not divided by$2$. Hence, $10648 = 2 \times 2 \times 2 \times 1331$
Now take, the second prime number, $3$ and divide
$1331 \div 3 = 443.6667$
So, $1331$ is not divisible by$3$. Therefore $3$ is not the factor.
Now, divide $1331{\text{ by 5}}$
$1331 \div 5 = 266.2$
As $1331$ is not divisible by $5$ and therefore $5$ is not the factor.
Now, divide $1331$ by $7$
$1331 \div 7 = 190.1429$
As, $1331$ is not divisible by$7$. Therefore $7$ is not the factor.
Now, divide $1331$ by $11$
$
1331 \div 11 = 121 \\
121 \div 11 = 11 \\
11 \div 11 = 1 \\
$
Therefore $11$ is the factor. And $1331 = 11 \times 11 \times 11$
Now, taking the given number-
$10648 = 2 \times 2 \times 2 \times 11 \times 11 \times 11$
Taking cube roots both the sides,
\[\sqrt[3]{{10648}} = \sqrt[3]{{2 \times 2 \times 2 \times 11 \times 11 \times 11}}\]
As per the definition we can write –
$
{2^3} = 2 \times 2 \times 2 \\
{11^3} = 11 \times 11 \times 11 \\
$
\[\sqrt[3]{{10648}} = \sqrt[3]{{{2^3} \times {{11}^3}}}\]
As, Cubes and cube-roots cancel each other-
\[
\sqrt[3]{{10648}} = 2 \times 11 \\
\sqrt[3]{{10648}} = 22 \\
\]
Thus, the cube-root of $10648$ is $22$. This is the required solution.
Note: Another method to find the prime factorization is to use the factor tree. A factor tree is the tool that breaks down any number into its prime factors.
Complete step by step answer:
To find the prime factorisation, start dividing the given number $10648$by the first prime number,$2$ Continue division until it is not divisible by$2$. Gradually start dividing by $3,{\text{ 5, 7, 11, 13,}}....$
Let’s start dividing the given number $10648$by $2$
$
10648 \div 2 = 5324 \\
5324 \div 2 = 2662 \\
2662 \div 2 = 1331 \\
1331 \div 2 = 665.5 \\
$
So, $1331$ is further not divided by$2$. Hence, $10648 = 2 \times 2 \times 2 \times 1331$
Now take, the second prime number, $3$ and divide
$1331 \div 3 = 443.6667$
So, $1331$ is not divisible by$3$. Therefore $3$ is not the factor.
Now, divide $1331{\text{ by 5}}$
$1331 \div 5 = 266.2$
As $1331$ is not divisible by $5$ and therefore $5$ is not the factor.
Now, divide $1331$ by $7$
$1331 \div 7 = 190.1429$
As, $1331$ is not divisible by$7$. Therefore $7$ is not the factor.
Now, divide $1331$ by $11$
$
1331 \div 11 = 121 \\
121 \div 11 = 11 \\
11 \div 11 = 1 \\
$
Therefore $11$ is the factor. And $1331 = 11 \times 11 \times 11$
Now, taking the given number-
$10648 = 2 \times 2 \times 2 \times 11 \times 11 \times 11$
Taking cube roots both the sides,
\[\sqrt[3]{{10648}} = \sqrt[3]{{2 \times 2 \times 2 \times 11 \times 11 \times 11}}\]
As per the definition we can write –
$
{2^3} = 2 \times 2 \times 2 \\
{11^3} = 11 \times 11 \times 11 \\
$
\[\sqrt[3]{{10648}} = \sqrt[3]{{{2^3} \times {{11}^3}}}\]
As, Cubes and cube-roots cancel each other-
\[
\sqrt[3]{{10648}} = 2 \times 11 \\
\sqrt[3]{{10648}} = 22 \\
\]
Thus, the cube-root of $10648$ is $22$. This is the required solution.
Note: Another method to find the prime factorization is to use the factor tree. A factor tree is the tool that breaks down any number into its prime factors.
Recently Updated Pages
A boat goes 24 km upstream and 28 km downstream in class 10 maths CBSE

Write any three differences between metals and nonmetals class 10 social science CBSE

Amit standing on a horizontal plane finds a bird flying class 10 maths CBSE

Two circles of radii 5 cm and 3 cm intersect at two class 10 maths CBSE

Solve the following i John and Jivanti together have class 10 maths CBSE

What is the relation between orthocenter circumcentre class 10 maths CBSE

Trending doubts
Explain the Treaty of Vienna of 1815 class 10 social science CBSE

10 examples of evaporation in daily life with explanations

What is the full form of POSCO class 10 social science CBSE

Make a sketch of the human nerve cell What function class 10 biology CBSE

Differentiate between Xylem and phloem class 10 biology CBSE

Identify the feminine form of noun nephew a shenephew class 10 english CBSE

