# [18/11/2020] Lecture 01 – Know the Numbers, Divisibility Test, counting occurence of any digit between two numbers

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## 18 thoughts on “[18/11/2020] Lecture 01 – Know the Numbers, Divisibility Test, counting occurence of any digit between two numbers”

1. could not understand the osculator method properly

1. See once again pls

2. Forget and just remember the following:
Ex:Osculator of 7:
73=21
=> 21-1=20=>10
2 , since we used minus sign here , so 7’s negative osculator is 2.
Or
77=49
=> 49+1=50=>10
5, since we used plus sign here, so 7’s ‘1 more osculator ‘ is 5.

1. Sorry multiply sign is not showing properly after posting

2. 2. Osculator concept was quite good and interesting. Thanks a lot , please provide PDF as well . Well overall good experience up-till now.

3. Why u multiply by 2 (2375 divisibility by 7)
Or 2is -ve osculator of 7 hence u multiply by 2

1. Yes thats why

4. Thank you so much mam, video was amazing, learnt new new concepts

5. Mam 2375 is four dig it no. But why you taken 237?

1. In method only…U have to make two groups…one is unit digit and other is rest of the digits of number…seperate unit digit of given number and multiply it withe osculator then add it or subtract it as in case of negative osculator to the other digits grp…repeat the method. Then wen u get very small number u can chk whegher its divisible or not.

6. Gained clearity. Tqsm

7. Plz explain asculator again