Divisibility Rule for 3
Divisibility Rule for 3
Divisibility Rule for 3: This rule is used to check whether a number is divisible by 3 or not without performing long division. A number is divisible by 3, if the sum of its digits is divisible by 3. Otherwise the number is not divisible by 3. The remainder obtained by dividing the number by 3 is same as the remainder obtained by dividing the sum of its digits by 3.
ILLUSTRATION: Consider the number n = 7856421 .
The sum of the digits of n is 7 + 8 + 5 + 6 +4 +2 +1 = 33, which is divisible by 3. So, n is divisible by 3.
Let us now consider another number m = 78215.
The sum of its digits is 7 + 8 + 2 + 1 + 5 = 23, which is not divisble by 3. So, m is not divisble by 3.
This can also be verified by the actual division of 78215 by 3. The remainder obtained by dividing m by 3 is equal the remainder when 23 is divided by 3.Clearly , it is 2.
278136369 is divisible by ________________ | |||
| Right Option : B | |||
| View Explanation | |||
2781 is divisible by ________________ | |||
| Right Option : B | |||
| View Explanation | |||
9876 is divisible by ________________ | |||
| Right Option : D | |||
| View Explanation | |||
Students / Parents Reviews [10]
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.
Om Umang
10thA 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.
Archit Segal
7thMy experience with Abhyas academy is very good. I did not think that my every subject coming here will be so strong. The main thing is that the online tests had made me learn here more things.
Hiya Gupta
8thIt 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
Barkha Arora
10thOne 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.
Aman Kumar Shrivastava
10thI 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
Yatharthi Sharma
10thIt 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.
Eshan Arora
8thIt 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.
Cheshta
10thMy 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.
Ayan Ghosh
8thMy experience with Abhyas is very good. I have learnt many things here like vedic maths and reasoning also. Teachers here first take our doubts and then there are assignments to verify our weak points.
