by Hello ? my today’s blog is how to find cube root of any number ..
First I tell meaning of cube root it means -: 5×5×5 =125 so in my exam it will come what is cube root of 125 so the answer will be 5 . 3 times multiplying a number gives it cube … And to find its cube root it s difficult to solve and think . From my method it is easy ye to solve cube roots for example take a number -729 can you tell it’s cube root by just seeing … No so to find cube root in easier way let’s begin with my technique. Let’s take a. Number 4913 now we have to find its cube root it’s super easy to find we will make 2 groups of last 3 end digits and the remaining number so in above number 913 and 4 are 2 groups now now the number 913 we will find the last number of its cube root which will be 3×3×3 = 27 so the last digit of 27 . Is 7 so it will the end number of 4913 cuberoot now the second group is 4 now we will think 4 will come between which cube it will be 1³ and 2 cube so now we will round off 4 is more closer to 1 or 8 it will be 1 so 1 cube is more closest so the answer is 17. 1 of round off and 7 of end number of the group
So by this method you can solve bigger numbers also you just have to make 2 groups of Last 3 digits and the remaining
This is very easy method the other method is prime factories to find cube root . …………
So here is a number for you 12167 ?? Comment the answer and if any doubt . Please comment ☺️ will meet tomorrow bye bye ??
Yar nahi samajh aya, Samaira ?.. Will need another explanations d pls go slow.. even 4913 I couldn’t complete the answer ..Help.. please
Hi mamu it’s easy .. let’s take number 12167 so make 2 groups of last 3 digits and 2 digits always last three digits will be 1 group and other left numbers are 2 group …. Now we will take 1 group which is 167 now the end number 7 . Will give us cube root last digit how ??
We will do 7×7×7 =343 so the end digit of 343 will be the end digit of cube root of 12167 . So the end digit of 343 is 3 which means the cube root of 12167 will end with 3 . Now this is the 1 step .. to find end digit . Is the first step
Now the second step is take second group which is 12 now think 12 will come between which 2 cube so think 1³ = 1 , 2³= 8 , 3³= 27 so 12 will be between 8-27 so between 2³- 3³ so now we will estimate 12 is more closer to 2³ so 2 is the first number so both numbers are 23 … So answer is 23 you may check in calculator … Mamu please tell have you understand ?https://youtu.be/mycJjUKz_r4
You may see this and try to solve on paper
Love you
Samaira
cube root of 12167.
here it goes first we will make the pair of last 3 digits which will be 167 and 12 12 167
now the cube of 7 is 343 hence end digit id 3.
and 12 lies between 2^3= 8 and 3^3= 27 the number close to 12 is 8
hence the answer would be 23.
thanks.