How To find out the value of cube root of 8
We will find factors of the number 8 then we will take cube root of the number. it is a value which when multiplied by itself three times gives the value, 8 So let’s start-
Step 1: The given value is 8
Step 2: Now we will find the factors of 8.
8 is divisible completely by 1, 2, 4 and 8.
So the Factors of 8 are 1,2,4 and 8. The factors greater than 1 are 2,4 and 8 .
Step 3: if 2 is multiplied three times, the value is 8.
2*2*2 =8
Step 4: Hence 2 is considered to be the cube root of 8
Step 5: Therefore, we can say that the value of cube root of 8 is 2
Step 6 : We express the value of cube root of 8 as ∛8 = 2
Since the cube root symbol is denoted by ∛
Multiple Choice Question
No 1) what are the prime factors of 8 –
a) 2
b) 2 and 9
c) 1, 2, 6 and 9
d) 2 and 8
Answer — a) 2.
Because it has only two divisors or factors 1 and 2. It cannot be divided by any other number except the number 1 and itself.
No.2) Why 8 is not a Prime number ?
a) Because it has more than two factors other than 1 and itself
b) Because it is divisible by 2 and 9 c completely
c) Since It has more than two factors
d) All of the above
Answer — D). All of the above.
Because 8 has more than two factors. A number is said to be Prime when it is divided by the number 1 and itself. Other than two factors, 1 and itself it has more factors i.e., 2 and 4. Hence 8 is not a prime number