Cube roots of perfect cubes up to 6 digits can be easily found by this method. From the table of cubes, we observe that the cube of a number ending in 0,1,2,3,4,5,6,7,8, and 9 ends in 0,1,8,7,4,5,6,3,2, and 9, respectively .Thus, by looking at the ones digit of a perfect cube, we can determine the ones digit of its cube root. To determine the other digits of the cube root, we follow the following steps:
Step 1: look at the digit at the ones place of the perfect cube and determine the digit at the ones place in the cube root of the given number.
Step 2: Strike out from the right, the last three digits of the number. If nothing is left, we stop. The digit in step 1 is the cube root of the given number.
Step 3: Now consider the leftover number from step 2. Find the largest 1-digit number whose cube is less than or equal to this leftover number. This is the tens digit of the cube root of the given number.
Illustration: Find the cube root of 512 by using its ones and tens digits.
Solution: The ones digits of the number 512 is 2.
Hence, the digit at the ones place in the cube root of 512 is 8.No number is left after striking out the three digits from the right (ones, tens, and hundreds) of the number.
The unit and tens digit in the cube root of 4913 are respectively ____ . | |||
Right Option : C | |||
View Explanation |
The unit digits in the cube root of 512,729,3375 are respectively ________________ . | |||
Right Option : C | |||
View Explanation |
The unit digit in the cube root of 64,125 are respectively __________ . | |||
Right Option : B | |||
View Explanation |
A marvelous experience with Abhyas. I am glad to share that my ward has achieved more than enough at the Ambala ABHYAS centre. Years have passed on and more and more he has gained. May the centre flourish and develop day by day by the grace of God.
My experience was very good with Abhyas academy. I am studying here from 6th class and I am satisfied by its results in my life. I improved a lot here ahead of school syllabus.
Abhyas is a complete education Institute. Here extreme care is taken by teacher with the help of regular exam. Extra classes also conducted by the institute, if the student is weak.
It was a good experience with Abhyas Academy. I even faced problems in starting but slowly and steadily overcomed. Especially reasoning classes helped me a lot.
It was good as the experience because as we had come here we had been improved in a such envirnment created here.Extra is taught which is beneficial for future.
I have spent a wonderful time in Abhyas academy. It has made my reasoning more apt, English more stronger and Maths an interesting subject for me. It has given me a habbit of self studying
About Abhyas metholodology the teachers are very nice and hardworking toward students.The Centre Head Mrs Anu Sethi is also a brilliant teacher.Abhyas has taught me how to overcome problems and has always taken my doubts and suppoeted me.
It has a great methodology. Students here can get analysis to their test quickly.We can learn easily through PPTs and the testing methods are good. We know that where we have to practice
Being a parent, I saw my daughter improvement in her studies by seeing a good result in all day to day compititive exam TMO, NSO, IEO etc and as well as studies. I have got a fruitful result from my daughter.
One of the best institutes to develope a child interest in studies.Provides SST and English knowledge also unlike other institutes. Teachers are co operative and friendly online tests andPPT develope practical knowledge also.