Square root of 162

In this topic, the square root of 162 is ±12.72. The square root of 162 is expressed as √162, in radical form. It is expressed as (162)^½ in exponential form.

If a student wants to find the square root of a number. Which are the methods they can use?  Some common methods are,

• Prime factorization

• Long division

• Approximation

• Subtraction method

Let’s check the square root of 162 using these methods 

In this method, all the prime factors of the number are listed down and then from there one number from each pair is listed down. Then the numbers are multiplied together. 

By using prime factorization, let’s check out the square root of 162.

Step 1: Listing out the prime factors of 162 and pairing the same numbers.

Prime factors of 162 = 2 × 3 × 3 × 3 × 3 

Pairing the factors i.e, 2 ×  (3 × 3), (3 × 3)

Step 2: multiplying a number from each pair

√2 × 3 × 3 = 9√2

Hence, the √162 is 9√2 
 

Using the long division method, let’s check the square root of 162

Step 1: The number given, 162 has three digits so let’s pair that number. Here it is 1 and 62.

Finding the number whose square is less than or equal to the 1

 Here the number is, because 1² = 1

Step 2: So, let’s divide 1 by 1

Step 3: Now, the quotient and divisor is 1, for the new divisor we add the divisor with itself.

Step 4: Continue the process till the remainder is 0

The quotient will be the square root of the number.

Therefore, the square root of 162 is ±12.727 
 

Approximation method is mainly used for not a perfect square. As 162 is not a perfect square, the approximation method can be used to find the square root of 162. 

Step 1: Find any two perfect squares numbers between which 162 lies. The two perfect squares are 12² (144) and 13² (169)

Therefore, the square root of 162 lies between 12 and 13, i.e, 12 < √162 <13

Step 2: for checking out the decimal part, the formula is 

given number - lower perfect square / bigger perfect square - lowest perfect square

Hence,162 - 144 /169 - 144  = 18 / 25 = 0.72

So, the approximate square of 162 is 12. 72

In the subtraction method, based on the fact, the sum of the first n odd number is n². So, here the given number is subtracted with the odd number starting with 1. The process will go on till the given number becomes 0. The method is mainly used for perfect squares; it is not used to find the square root of 162.
 

• Quotient: The result we got after dividing two numbers is the quotient

• Radical symbol: The radical symbol (√) is the symbol used to denote square root.

• Square of a number: The Square of a number is the product of the number when multiplied by itself.

• Prime factorization: It is the process of breaking down a number into prime numbers.