Divisibility Rule of 7
Divisibility Rule of 7
Divisibility Rule of 7:
To check for the divisibility of 7, take the last digit of the number, double it and subtract the doubled number from the remaining number. If the result is divisible by 7 (e.g. 14, 7, 0, -7, etc.), then the number is divisible by 7.
Illustration: Check whether 3101 is divisible by 7?
Solution: Step 1: take off the last digit of the number which is 1
Step 2: Double the last digit. So, it becomes 2.
Step 3: Subtract 2 from the remaining number i.e. 310. So, we obtain 310 - 2 = 308.
Step 4: Repeat the process by taking off the 8 from 308.
Step 5: Double it and subtract from the remaining number. So, 30 - 16 = 14
Step 6: The result is 14 which is a multiple of 7.
Hence, 3101 is divisible by 7.
Which of the following numbers are not divisible by 7 ? 443, 243, 494, 483 ,392 ,546 | |||
| Right Option : A | |||
| View Explanation | |||
Which of the following number is divisible by 7 ? 462, 392 | |||
| Right Option : C | |||
| View Explanation | |||
Which of the following number is divisible by 7 ? 462, 1757 | |||
| Right Option : C | |||
| View Explanation | |||
Students / Parents Reviews [10]
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
Yatharthi Sharma
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
7thAbhyas Methodology is very good. It is based on according to student and each child manages accordingly to its properly. Methodology has improved the abilities of students to shine them in future.
Manish Kumar
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Eshan Arora
8thAbout 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.
Shreya Shrivastava
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.
Shivam Rana
7thIt 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
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Ayan Ghosh
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
10thBeing 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.
