Teaching my son

[kpinky]

I am mom of a sweet son. I teach him all subjects. Especially i teach him maths as he is weak in maths. I always try to teach him simple methods giving more than one example. Now he has a maths problem. Check whether 6 raise to the n can end with digit 0 for n natural number http://youtu.be/fJUvGkqsGx8 i explained him the solution. I wanted to explain him few more examples like this. what are the other digits like 6 raise to n can end with digit 0

[MamaOfWill]

I looked at the video, but I don't see how 6 to the power of n can ever end with a 0 digit??

Please explain further.

10 or 20 (for example) to the power of n will always give a number ending with 0.

1, 2, 3 and 4 are examples of numbers that will not result in a number ending with 0 when raised to any natural number.

[kpinky]

Hey MamaOfWill thank you for your answer.It was great of you. I will explain this to my son. yesterday night he was saying that he has a problem like this use euclids lemma to show that the cube of any positive integer is of the form 9m,9m+1,9m+8 for some integer m. http://youtu.be/-0ecOgwLwJQ Actually he was not able to able to go school when euclids lemma theory was explained in his school. I am helpless as when i was in his class the theory was not in my curriculum.Please could you explain me this.

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