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Forum URL: http://www.cut-the-knot.org/cgi-bin/dcforum/forumctk.cgi
Forum Name: High school
Topic ID: 216
#0, Ways to get 100...
Posted by Bryan on Dec-04-02 at 08:23 PM
can anyone tell me how i would get to 100

using the numbers 1 8 4 7

u can use any from of mathematics..+ - / * and u can use powers, roots, fractions..etc

hehe this is for a project wondering if anyone else has done it or if there is a site i can go to to find it.


#1, RE: Ways to get 100...
Posted by Anonymous on Dec-05-02 at 05:25 PM
In response to message #0
Um... how about:

1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1


#2, RE: Ways to get 100...
Posted by golland on Dec-05-02 at 05:25 PM
In response to message #0
If you are allowed to use factorials (actually double factorials)
then 7!! = 1*3*5*7 = 105

7!! + 4 - 1 - 8 = 100


BG