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Author Message
Zealot
Posted: Fri Apr 05, 2002 9:40 pm    Post subject: 1

7^2 + 51?
CrystyB
Posted: Fri Apr 05, 2002 4:52 pm    Post subject: 0

code:
2+1       5
7 - 3

They're ok. Let's see... 343-243. DAMN! I should have remembered that B/C i thought it would be funny form me to have my university group #s 7^3 and (next year) 3^5!!!

Still looking 4 the other way...
Jingle47
Posted: Fri Apr 05, 2002 4:22 pm    Post subject: -1

Crysty-
7^2+1 -3^5
if you don't like the exponents without parentheses there is still another way
CrystyB
Posted: Fri Apr 05, 2002 1:39 am    Post subject: -2

Chuck, i already did that, since now with 2 operations we've got a tree of height 2-. But the operands are arbitrarily long numbers, and that screwed me.

TY both for the tip on + and x. 95=2x51-7, 99=2x51-3. Now for 100.

[This message has been edited by CrystyB (edited 04-04-2002 08:42 PM).]
Jingle47
Posted: Fri Apr 05, 2002 12:51 am    Post subject: -3

yes you could use the+as an x
so you could use a + and -
or a x and -
CrystyB
Posted: Thu Apr 04, 2002 3:11 am    Post subject: -4

what's wrong with my double factorial?
Zealot
Posted: Thu Apr 04, 2002 2:09 am    Post subject: -5

For the 1996 problem, I can get 66 without having to use either repeating decimals or a double factorial, but I haven't found another way to 65 or 67 yet.

66 = (-1 + 9) * 9 - 6
CrystyB
Posted: Wed Apr 03, 2002 11:38 pm    Post subject: -6

You mean
code:
3
5 -27+1

??? Then that's not fair!
Chuck
Posted: Wed Apr 03, 2002 11:38 pm    Post subject: -7

A computer program should be able to easily check every possible arrangement of 7 or fewer blocks, including turning them. Maybe I'll do that some time. Does turning mean that the + and × signs can either add or multiply?
Jingle47
Posted: Wed Apr 03, 2002 11:17 pm    Post subject: -8

99=5^3-27+1

------------------
I AM THE SMARTEST GUY ON THE BLOCK!
-Psst! "He lives in a cul-de-sac"
HyToFry
Posted: Wed Apr 03, 2002 10:53 pm    Post subject: -9

A chestnut is a puzzle that has been around for a very long time.

What is greater than god, more evil than the devil, the poor have it, the rich want it, and if you eat it, you will die. That's a chestnut. (the answer is: nothing)
Unfortunate Soul
Posted: Wed Apr 03, 2002 10:46 pm    Post subject: -10

Because I am very new at this, and I am asking a totally off-topic question that I would like answered.
What is a chestnut?

---------------------------
Rated NWS(not worthy of a signature)
mikegoo
Posted: Wed Apr 03, 2002 10:39 pm    Post subject: -11

Are we trying to get the original problem using only + and - now or are people still working on the 1996 thing?
CrystyB
Posted: Wed Apr 03, 2002 9:58 pm    Post subject: -12

I cannot for the life of me figure out 82, 90, 91, 95, 99 or 100. I'm positive i exhausted all possibilities.

code:

0=1+2-3
1=1
2=2
3=3
4=3+1
5=5
6=5+1
7=7
8=7+1
9=7+2
10=7+3
11=13-2
12=12
13=13
14=17-3
15=17-2
16=21-5
17=17
18=15+3
19=17+2
20=17+3
21=21
22=27-5
23=23
24=23+1
25=25
26=25+1
27=27
28=27+1
29=31-2
30=27+3
31=31
32=32
33=32+1
34=35-1
35=35
36=35+1
37=37
38=37+1
39=37+2
40=37+5-2
41=37+5-1
42=37+5
43=75-32
44=51-7
45=52-7
46=53-7
47=12+35
48=51-3
49=51-2
50=51+2-3
51=51
52=52
53=53
54=53+1
55=53+2
56=25+31
57=57
58=57+1
59=57+2
60=57+3
61=25+37-1
62=25+37
63=75-12
64=75-13+2
65=12+53
66=75-12+3
67=72-5
68=73-5
69=71-2
70=57+13
71=71
72=72
73=73
74=73+1
75=75
76=75+1
77=75+2
78=75+3
79=57+23-1
80=57+23=72+13-5
81=153-72
.
83=51+32
84=72+15-3
85=72+13
86=73+15-2
87=75+12
88=75+13
89=57+32
.
.
92=127-35
93=71+25-3
94=71+23
.
96=71+25
97=73+25-1
98=73+25
.
.

Hmm, i overlooked some expressions though: 82=125-43, 90=41+52-3, 91=125-34 (exhaustive programs work ). But still, that leaves 95, 99 and 100.
Bicho the Inhaler
Posted: Wed Apr 03, 2002 3:19 pm    Post subject: -13

Looks like I had 6! as 72 for some inscrutable reason
CrystyB
Posted: Wed Apr 03, 2002 2:48 pm    Post subject: -14

Damn! I knew i should make some version opf my backtracking program to take into account adjacent digits... I'll do by hand all of them that aren't done above.

1980 was my idea b/c i wanted my b-day. 5, 28 and 80 would have been too easy. Sorry for the added (multiplied!) complexity...

As i said, if N is -1 +/-something, N+1 and N+2 can be easily produced:
65 = -1 +9+9 + 6!!
66 = 1*9+9 + 6!!
67 = 1 +9+9 + 6!!

HEY! 6-factorial is 720. 6-double-fact is 48. What were you thinking of?

(i myself have used paranthesis notation for repeating: 1/3=0.(3), FWIW)

[This message has been edited by CrystyB (edited 04-03-2002 10:26 AM).]
Bicho the Inhaler
Posted: Wed Apr 03, 2002 4:14 am    Post subject: -15

66 = 1 * 99 * .6r

If you weren't here for the 4444 thread, ".6r" means 0.66666... = 2/3. Most people, I think, write it as 0.6 with a bar over the six (or possibly a dot):
code:
_     .
.4 or .4

But we ended up just notating it with "r" because it's less cumbersome.
Bicho the Inhaler
Posted: Wed Apr 03, 2002 4:07 am    Post subject: -16

I can't believe I did that; silly typo. I'll fix it.
Zealot
Posted: Wed Apr 03, 2002 3:50 am    Post subject: -17

I just realized after seeing Bicho's post that my last bunch were also in the form of 1969 rather than 1996. I'm pretty sure cubestudent wasn't doing extra credit problems two decades before he was born .
Bicho the Inhaler
Posted: Wed Apr 03, 2002 3:45 am    Post subject: -18

edit: What was I thinking??? post deleted.

[This message has been edited by Bicho the Inhaler (edited 04-03-2002 10:18 AM).]
Jingle47
Posted: Wed Apr 03, 2002 2:46 am    Post subject: -19

Well Making 1980 is very hard. Who's crazy idea was this anyway?
Are log and LN considered mathmatical operations in this context?

By the way I see you all have found numbers 1-100.
How about if I told you you can do it without using any of these blocks.

(
)
X
log
%

That's right you can form all 100 using only 7 blocks.
Zealot
Posted: Wed Apr 03, 2002 2:45 am    Post subject: -20

41 - 64 is quite enough, I'll let someone else have a try from here.
Zealot
Posted: Wed Apr 03, 2002 2:44 am    Post subject: -21

62 = -1 + 9 + 9 * 6
63 = 1 * 9 + 9 * 6
64 = 1 + 9 + 9 * 6

[This message has been edited by Zealot (edited 04-03-2002 09:06 PM).]
Zealot
Posted: Wed Apr 03, 2002 2:33 am    Post subject: -22

56 = -1 + Ö9 + 9 * 6
57 = 1 * Ö9 + 9 * 6
58 = 1 + Ö9 + 9 * 6
59 = -1 + (Ö9)! * 9 + 6
60 = 1 * (Ö9)! * 9 + 6
61 = 1 + (Ö9)! * 9 + 6
Zealot
Posted: Wed Apr 03, 2002 2:30 am    Post subject: -23

cubestudent
Posted: Wed Apr 03, 2002 2:29 am    Post subject: -24

i'm assuming you meant: -Ö9 in 52
Zealot
Posted: Wed Apr 03, 2002 2:27 am    Post subject: -25

53 = -1^9 + 9 * 6
54 = 1^9 * 9 * 6
55 = 1^9 + 9 * 6
Zealot
Posted: Wed Apr 03, 2002 2:25 am    Post subject: -26

50 = -1 - Ö9 + 9 * 6
51 = -1 * Ö9 + 9 * 6
52 = 1 - Ö9 + 9 * 6

[This message has been edited by Zealot (edited 04-02-2002 09:30 PM).]
Zealot
Posted: Wed Apr 03, 2002 2:22 am    Post subject: -27

47 = -1 + (Ö9)! * 9 - 6
48 = 1 * (Ö9)! * 9 - 6
49 = 1 + (Ö9)! * 9 - 6
Chuck
Posted: Wed Apr 03, 2002 2:15 am    Post subject: -28

Simpler for 37:

37 = 19 + (Ö9) × 6
cubestudent
Posted: Wed Apr 03, 2002 2:09 am    Post subject: -29

i think Bicho messed up on his 37:
Quote:
37 = 1 + 9 + (Ö9) * 6
mine was:
37 = 1 + (Ö9 + Ö9) * 6

[{edited {{for{ }}incorrect} }parenthesising{]

[This message has been edited by cubestudent (edited 04-02-2002 09:11 PM).]
Zealot
Posted: Wed Apr 03, 2002 2:03 am    Post subject: -30

44 = -1 + 9 + (Ö9)! * 6
45 = 1 * 9 + (Ö9)! * 6
46 = 1 + 9 + (Ö9)! * 6

and I did have that one for my other solution to 42
cubestudent
Posted: Wed Apr 03, 2002 2:02 am    Post subject: -31

i like:
42 = (1 + Ö9 + Ö9) * 6
better

[This message has been edited by cubestudent (edited 04-02-2002 09:03 PM).]
Bicho the Inhaler
Posted: Wed Apr 03, 2002 2:01 am    Post subject: -32

Besides, it's more fun not to keep using the same thing, y'know?
Zealot
Posted: Wed Apr 03, 2002 1:52 am    Post subject: -33

I know... but I found 2 ways to do 42 before finding that way that would work for all three. I put the one I had come up with first.
CrystyB
Posted: Wed Apr 03, 2002 1:51 am    Post subject: -34

Zealot, why bother looking for other expressions for x when you have -1+E(x) and 1+E(x)? Use 1*E(x)!

[This message has been edited by CrystyB (edited 04-02-2002 08:55 PM).]
Zealot
Posted: Wed Apr 03, 2002 1:48 am    Post subject: -35

41 = -1 + (Ö9)! * (Ö9)! + 6
42 = (1 - Ö9 + 9) * 6
43 = 1 + (Ö9)! * (Ö9)! + 6

Yay! I got 42!

[This message has been edited by Zealot (edited 04-02-2002 08:49 PM).]
Zealot
Posted: Wed Apr 03, 2002 1:28 am    Post subject: -36

My password field always goes blank when I do that, and I like just using the keyboard. Alt + Tab, F5, no new replies, Alt + Tab back to my reply

Thanks, I'll try that.

I can get 518 and 523, but no 528 yet...

[This message has been edited by Zealot (edited 04-02-2002 08:36 PM).]
CrystyB
Posted: Wed Apr 03, 2002 1:25 am    Post subject: -37

38 = -1 + (Ö9) + (Ö9)! * 6
39 = 1 * (Ö9) + (Ö9)! * 6
40 = 1 + (Ö9) + (Ö9)! * 6

Zealot, you could just refresh the iframe beneath the text box. That's a right-click + R, so that you know i use the keyboard myself. But to an extent. I don't always use tabs and spaces to push buttons, though i mostly do.

The problem w/ EDIT is that after you submit, it takes you to the first page, so you don't know IF there are any new posts... But you can post reply from page 1 and check out last page as i stated above.

[This message has been edited by CrystyB (edited 04-02-2002 08:32 PM).]
cubestudent
Posted: Wed Apr 03, 2002 1:23 am    Post subject: -38

Crysty:

I certainly don't know how to do 1980. I have no doubt that someone here will figure it out, though.