Trick to find out cube root in short time

Trick to find out cube root in short time

Many times, we come across multiple choice questions in SSC as well as Banking exam related to the cube root. However, it is easy to find out cube root of any number with mathematical question but that takes too much time and it automatically reduces your performance in the exam. SSC as well as IBPS banks setters know that no one will give up in this easy question and they can easily confuse as well as waste lot of time of Govt. job aspirants by these types of questions. As well all are bachelors and most of us forget trick to find out cube root of any number; trick which we studied in our 8th school boards. Here, we are refreshing your memory with trick to find out cube of any number in 5 to 10 seconds. Some of you already know this trick; you can revise for increasing speed.

Trick to find out cube root in short time

For this trick, you should know at least last digit of cube of 1-9 numbers; here we are presenting;

Number Last digit of cube of number
1 1
2 8
3 7
4 4
5 5
6 6
7 3
8 2
9 9

 

You just need to learn this table, however you can derive your own in exam, and this is just for convenience and increasing your speed.

Now, we will let you know rest steps of this method by solving an example;

  • Find Cube root of 17576.

Check last digit of question matches with which number cube; clearly shows it matches with 6 number. It means, 6 would be your unit digit of answer. Now, forget last 3 digits. Now, check remaining digits; in above number; 175 is remaining digit. Check which number cube is nearest to 175. And it is 5. We choose 5 because its cube 125 is nearest. And this number would be your tenth digit.

So, answer is 56.

  • Find cube root of 50653.

Last digit of number is 3 which match with last digit of cube of 7. So, unit digit of answer is 7. Now, forget last 3 digits and check number whose cube is nearest to remaining number. Digits remaining are 50 and cube of 3 is nearest to 50.

So, answer is 37.

I hope everything is clear regarding trick to find out cube root of any number. Feel free to comment any query.

With regards, 

http://Govtentrance.team

http://www.snapdeal.com/product/apple-iphone-6-64-gb/131798351?utm_source=aff_prog&utm_campaign=afts&offer_id=%3C131798351%3E&aff_id=%3C46360%3E

 

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