Last updated on May 26th, 2025
The cube root of 100 is the value that, when multiplied by itself three times (cubed), gives the original number 100. Do you know? Cube roots apply to our real life also, like that for measuring dimensions, creating digital art, field of engineering, making financial decisions etc.
The cube root of 100 is 4.64158883361. The cube root of 100 is expressed as β100 in radical form, where the “ β ” sign is called the “radical” sign. In exponential form, it is written as (100)β . If “m” is the cube root of 100, then, m3=100. Let us find the value of “m”.
The cube root of 100 is expressed as β100 as its simplest radical form,
since 100 = 2×2×5×5
β100 = β(2×2×5×5)
Group together three same factors at a time and put the remaining factor under the β .
β100= β100
We can find cube root of 100 through a method, named as, Halley’s Method. Let us see how it finds the result.
Now, what is Halley’s Method? It is an iterative method for finding cube roots of a given number N, such that, x3=N,
where this method approximates the value of “x”.
Formula is βa≅ x((x3+2a) / (2x3+a)), where
a=given number whose cube root you are going to find
x=integer guess for the cubic root
Let us apply Halley’s method on the given number 100.
Step 1: Let a=100. Let us take x as 4, since, 43=64 is the nearest perfect cube which is less than 100.
Step 2: Apply the formula. β100≅ 4((43+2×100) / (2(4)3+100))= 4.63…
Hence, 4.63… is the approximate cubic root of 100.
Here are some common mistakes with their solutions given :
Find (β200/ β100) Γ (β200/ β100) Γ (β200/ β100)
(β200/ β100) × (β200/ β100) × (β200/ β100)
= (β200× β200× β200) / (β100× β100× β100)
=((200)β
)3/ ((100)β
)3
=200/100
=2
Answer: 2
We solved and simplified the exponent part first using the fact that, β200=(100)β and β100=(100)β , then solved.
If y = β100, find yΒ³/ yβΆ
y=β100
⇒ y3/y6= (β100)3 / (β100)6
⇒ y3/y6
= 100/ (100)2
= 1/100
Answer: 1/100
(β100)3=(1001/3)3=100, and β100)6=(1001/3)6=(16)2. Using this, we found the value of y3/y6.
Multiply β100 Γ β125
β100×β125
= 4.641×5
=23.205
Answer: 23.205
We know that the cubic root of 125 is 5, hence multiplying β125 with β100.
What is β(100βΆ) ?
β(1006)
= ((100)6))1/3
=( 100)2
= 10000
Answer: 10000
We solved and simplified the exponent part first using the fact that, β100=(100)β
, then solved.
Find β(100+(-36)).
β(100-36)
= β64
=4
Answer: 4
Simplified the expression, and found out the cubic root of the result.
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.
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