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583 LearnersLast updated on August 5, 2025

The square root of 136 is ±11.662. Finding the square root of a number is the inverse process of finding the perfect square. The square root of 136 is written as √136.
The different ways to find the square root of a number are prime factorization, long division and approximation/estimation method
The prime factorization of 136 breaks 136 into its prime numbers.
The numbers 2 and 17 are the prime numbers
Prime factorization of 136 is 23 × 17
Since 2 is repeating, we can pair them and 17 is not repeating we can’t pair 17 with 2.
Therefore, √136 is expressed as 2√2√17, the simplest radical form


The long division method finds the square root of non-perfect squares.
Step 1: Write down the number 136
Step 2: Number 136 is a three-digit number, so pair them as (1), (36)
Step 3: Find the largest that is closest to the first pair (1), which is 12
Step 4: Write down 1 as the quotient, which will be the first digit of the square root.
Step 5: Subtracting 12 from 1 will leave zero as the remainder. Now bring down the second pair (36) and place it beside 0.
Step 6: Now double the quotient you have, that is multiply the quotient 1 with 2 and the result will be 2
Step 7: Choose a number such that it can be placed after 2. The two-digit number created should be less than the second pair (36). Here, we place number 1 after 2, because the number formed is less than 35.
Step 8: Subtract 21 from 36 → 36-21 = 15. Now add a decimal point after the new quotient and adding two zeros will make it 1500
Step 9: Apply step 7 over here and continue the process until you reach 0.
Step 10: We can write √136 as 11.662
The approximation method finds the estimated square root of non-perfect squares.
Step 1: Identify the closest perfect square to 136. Numbers 121 and 144 are the closest perfect square to 136.
Step 2: We know that √121 = 11 and √144 = 12. Thus, we can say that √136 lies between 11 and 12.
Step 3: Check if √136 is closer to 11 or 12. Let us take 11.5 and 12. Since (11.5)2 is 132.25 and (12)2 is 144, √136 lies between them.
Step 4: We can keep changing the values of 11.5 to 11. 6 and iterate the same process without changing 12 as the closest perfect square root.
The result of √136 will be 11.662
Take a look at mistakes a child can make while finding the square root of 136:
A square garden has an area of 136 square units. Calculate the length of its diagonal.
The length of the diagonal is 11.662 x √2.
We know that the side length of the square is √136, which is 11.662.
The diagonal of a square is calculated using the formula ‘d = s√2’. Here, s is 11.662
Therefore, according to the formula, d = 11.662√2.
Simplify (√136+ √136) ⤫ √136
The value of (√136+ √136) ⤫ √136 is 271.95
The approximate value of root 136 is 11.662. Apply this value to the equation given, (11.662 + 11.662) x 11.662 to get 271.95 as the value.
Find the value for 2a +b = 24, where a = √136
The value is 1.324
It’s already given that a = √136, apply this value to the equation.
Therefore, the equation becomes → 2 × √136 + b = 24 → 2 × 11.662 +b = 24
23.324 + b = 24 → b = 24 - 23.324 = 1.324

Jaskaran Singh Saluja is a math wizard with nearly three years of experience as a math teacher. His expertise is in algebra, so he can make algebra classes interesting by turning tricky equations into simple puzzles.
: He loves to play the quiz with kids through algebra to make kids love it.






