GMAT - Why do divisibility rules work ?
Автор: GMAT with CJ
Загружено: 2022-11-17
Просмотров: 614
Описание:
As GMAT aspirants, we hear divisibility rules - how to check whether a number is divisible by 2, 3, 4, 5, 6, 8, 9, or 11 without doing an actual division.
Have you wondered why these divisibility rules work? How did somebody arrive at these rules?
In this video, I explain why these rules work. This video is the second in the 'Why' series of videos in which I explain why things work in quant the way they do.
If you have any such 'why' questions, please let me know. I'll be happy to cover that in a future video.
Here's the link to the first video (Why are all prime numbers of form 6n+1 or 6n-1?): • Why are all prime numbers of the form 6n+1...
Chapters:
0:52 - Divisibility rule of 2
3:00 - Divisibility rule of 4
4:05 - Divisibility rule of 8
5:05 - Divisibility rule of 3 and 9
8:45 - Divisibility rule of 5
9:42 - Divisibility rule of 6
9:58 - Divisibility rule of 11
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