## help!!! This question is really really hard!

Need help with a math problem? We won't give you the answer but can lead you in the right direction. Put the type of problem and grade level in the title please.

## My name starts with the letter...

A
2
8%
B
1
4%
C
0
D
0
E
1
4%
F
0
G
1
4%
H
0
I
0
J
1
4%
K
0
L
0
M
3
12%
N
0
O
2
8%
P
0
Q
0
R
0
S
0
T
1
4%
U
1
4%
V
0
W
0
X
1
4%
Y
1
4%
Z
2
8%
I don't have a name!
1
4%
4
16%
I feel bored...
3
12%

### help!!! This question is really really hard!

The Question is:

ABCDEF is a 6-digit number. When it is multiplied by 3, the result is BCDEFA. When it is multiplied by 5, the result is FABCDE. What number is ABCDEF?

I'd be eternally grateful if you would help!!!!!! Thanks in advance!
hoshi.guiva
Kindergarten

Posts: 1
Joined: Fri Apr 29, 2011 7:23 am

### Re: help!!! This question is really really hard!

take a look at this: viewtopic.php?f=13&t=50
Q.E.D. , or not?
Zapp
University

Posts: 124
Joined: Thu Feb 10, 2011 3:49 pm

### Re: help!!! This question is really really hard!

the first 6 digits of the fraction 1/7 (142857).
There was an open question which i have asked many proffesors and fellow mathematicians, but none were able to answer:

Is there a function f:R->R (not necessarily continuous on ALL of R) which:
for every linear function g(x)=m*x+n, there is a number X for which g is the tangent of f in? (for each x g(x)=f(X)+f'(X)(x-X))
i think not.

(i almost solved it - using a small set theory tweak and a big topology tweak)
Ekuurh
Elementary School

Posts: 14
Joined: Tue Apr 19, 2011 12:28 pm

### Re: help!!! This question is really really hard!

the precentages in the poll thing sum up to 81% O.O
There was an open question which i have asked many proffesors and fellow mathematicians, but none were able to answer:

Is there a function f:R->R (not necessarily continuous on ALL of R) which:
for every linear function g(x)=m*x+n, there is a number X for which g is the tangent of f in? (for each x g(x)=f(X)+f'(X)(x-X))
i think not.

(i almost solved it - using a small set theory tweak and a big topology tweak)
Ekuurh
Elementary School

Posts: 14
Joined: Tue Apr 19, 2011 12:28 pm

### Re: help!!! This question is really really hard!

Ekuurh wrote:the precentages in the poll thing sum up to 81% O.O

No it doesn't. It sums up to just above 100, which can be explained due to the rounding of fractions (100/15 < 7).
kualkerr
Kindergarten

Posts: 1
Joined: Mon Feb 14, 2011 10:17 am