The Math Forum

Search All of the Math Forum:

Views expressed in these public forums are not endorsed by NCTM or The Math Forum.

Math Forum » Discussions » sci.math.* » sci.math

Notice: We are no longer accepting new posts, but the forums will continue to be readable.

Topic: Help on 7^20 (mod 100)
Replies: 5   Last Post: Jul 5, 2007 11:23 AM

Advanced Search

Back to Topic List Back to Topic List Jump to Tree View Jump to Tree View   Messages: [ Previous | Next ]

Posts: 100
Registered: 2/24/07
Re: Help on 7^20 (mod 100)
Posted: Jul 4, 2007 4:31 PM
  Click to see the message monospaced in plain text Plain Text   Click to reply to this topic Reply

student a écrit :

> yes, obviously 50^2 = 0 (mod 100), 2*50 = 0 (mod 100). so
> (7^4)^5=1(mod 100)

More genraly, to do such explicit computations, it's interesting to
compute the first few terms to see a possible simplification.


Point your RSS reader here for a feed of the latest messages in this topic.

[Privacy Policy] [Terms of Use]

© The Math Forum at NCTM 1994-2018. All Rights Reserved.