Help in ensuring...

For students of class 9-10 (age 14-16)
Dipan
Posts:158
Joined:Wed Dec 08, 2010 5:36 pm
Help in ensuring...

Unread post by Dipan » Sat Jan 01, 2011 9:57 pm

I have got this prob in last year...it was, find the last two digit of 3^500...I have got the last number in an easy way...today I have solved it fully....but don't know is it right or wrong....
3 =_ -7 (mod 10)
so,3^4 =_ -7^4 =_ 01
so,3^4*125 =_ 01^250 =_ 01
I am not expert at using latex..sorry for this ....please tell me is it right or wrong??????????

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Labib
Posts:411
Joined:Thu Dec 09, 2010 10:58 pm
Location:Dhaka, Bangladesh.

Re: Help in ensuring...

Unread post by Labib » Sat Jan 01, 2011 11:04 pm

@dipan bro, you are correct. btw if you dont know latex, you should have just wrote the equ generally. then you should have taken the moderators' help. your equation really looks ugly and hard to understand. :(
Please Install $L^AT_EX$ fonts in your PC for better looking equations,
Learn how to write equations, and don't forget to read Forum Guide and Rules.


"When you have eliminated the impossible, whatever remains, however improbable, must be the truth." - Sherlock Holmes

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