Math Is Fun Forum
  Discussion about math, puzzles, games and fun.   Useful symbols: ÷ × ½ √ ∞ ≠ ≤ ≥ ≈ ⇒ ± ∈ Δ θ ∴ ∑ ∫ • π ƒ -¹ ² ³ °

You are not logged in.

#101 2010-03-01 11:13:21

phrontister
Real Member
From: The Land of Tomorrow
Registered: 2009-07-12
Posts: 3,928

Re: Add 13 more and post it forever.

1313.

Lucky I'm not triskaidekaphobic.


"The good news about computers is that they do what you tell them to do. The bad news is that they do what you tell them to do." - Ted Nelson

Offline

#102 2010-03-01 11:26:44

bobbym
Administrator
From: Bumpkinland
Registered: 2009-04-12
Posts: 90,784

Re: Add 13 more and post it forever.

That is Herman and Lily Munster's address. 1313 Mockingbird lane.


In mathematics, you don't understand things. You just get used to them.

I agree with you regarding the satisfaction and importance of actually computing some numbers. I can't tell you how often I see time and money wasted because someone didn't bother to run the numbers.

Online

#103 2010-03-01 11:45:38

phrontister
Real Member
From: The Land of Tomorrow
Registered: 2009-07-12
Posts: 3,928

Re: Add 13 more and post it forever.

1339.

The difference between the first and second pairs of digits of the difference between 1339 and its reverse is 13.

(9331 - 1339 = 7992, and 92 - 79 = 13)


"The good news about computers is that they do what you tell them to do. The bad news is that they do what you tell them to do." - Ted Nelson

Offline

#104 2010-03-01 20:30:48

bobbym
Administrator
From: Bumpkinland
Registered: 2009-04-12
Posts: 90,784

Re: Add 13 more and post it forever.

1352 = 2^3 + 4^3 + 4^3 + 4^3 + 4^3 + 4^3 + 8^3 + 8^3


In mathematics, you don't understand things. You just get used to them.

I agree with you regarding the satisfaction and importance of actually computing some numbers. I can't tell you how often I see time and money wasted because someone didn't bother to run the numbers.

Online

#105 2010-03-02 19:06:23

Tigeree
Member
Registered: 2005-11-19
Posts: 13,848

Re: Add 13 more and post it forever.

Phro, if you were triskaidekaphobic you wouldn't even be on this thread.

Anywho... 1352+13=....(time to think)... 1365


People don't notice whether it's winter or summer when they're happy.
~ Anton Chekhov
Cheer up, emo kid.

Offline

#106 2010-03-02 23:29:31

bobbym
Administrator
From: Bumpkinland
Registered: 2009-04-12
Posts: 90,784

Re: Add 13 more and post it forever.

1378.000001


In mathematics, you don't understand things. You just get used to them.

I agree with you regarding the satisfaction and importance of actually computing some numbers. I can't tell you how often I see time and money wasted because someone didn't bother to run the numbers.

Online

#107 2010-03-03 22:12:50

Tigeree
Member
Registered: 2005-11-19
Posts: 13,848

Re: Add 13 more and post it forever.

just...
1391


People don't notice whether it's winter or summer when they're happy.
~ Anton Chekhov
Cheer up, emo kid.

Offline

#108 2010-03-03 22:14:39

phrontister
Real Member
From: The Land of Tomorrow
Registered: 2009-07-12
Posts: 3,928

Re: Add 13 more and post it forever.

ONE + FOUR - ZERO + FOUR = 1404
Each letter in the puzzle stands for a different digit from 1 to 7. Find the letter values.

Hi Bobby,
What's the significance of the ".000001" after "1378"?

Last edited by phrontister (2010-03-03 22:50:09)


"The good news about computers is that they do what you tell them to do. The bad news is that they do what you tell them to do." - Ted Nelson

Offline

#109 2010-03-03 22:33:13

Tigeree
Member
Registered: 2005-11-19
Posts: 13,848

Re: Add 13 more and post it forever.

Ohh, well I guess that's why it's called puzzles and games, but on the other hand I'll let someone else do it.

1417


People don't notice whether it's winter or summer when they're happy.
~ Anton Chekhov
Cheer up, emo kid.

Offline

#110 2010-03-04 02:00:52

bobbym
Administrator
From: Bumpkinland
Registered: 2009-04-12
Posts: 90,784

Re: Add 13 more and post it forever.

Hi phrontister;

There are 23 other solutions:

New number 1430:


In mathematics, you don't understand things. You just get used to them.

I agree with you regarding the satisfaction and importance of actually computing some numbers. I can't tell you how often I see time and money wasted because someone didn't bother to run the numbers.

Online

#111 2010-03-04 02:44:15

phrontister
Real Member
From: The Land of Tomorrow
Registered: 2009-07-12
Posts: 3,928

Re: Add 13 more and post it forever.

Hi Bobby,

Sorry, but your answer is incorrect...it should only come from the digits 1 to 7.

You said on that other site that you use Mathematica for these. Could you post your Mathematica code of this puzzle for me to learn from? Thanks.

I used BASIC to help me construct the puzzle.

New number: 1443.

Last edited by phrontister (2010-07-25 23:37:47)


"The good news about computers is that they do what you tell them to do. The bad news is that they do what you tell them to do." - Ted Nelson

Offline

#112 2010-03-04 08:45:47

bobbym
Administrator
From: Bumpkinland
Registered: 2009-04-12
Posts: 90,784

Re: Add 13 more and post it forever.

Hi phrontister;

What's the significance of the ".000001" after "1378"?

Roundoff error, just a nerd joke.

New number 1457


In mathematics, you don't understand things. You just get used to them.

I agree with you regarding the satisfaction and importance of actually computing some numbers. I can't tell you how often I see time and money wasted because someone didn't bother to run the numbers.

Online

#113 2010-03-04 11:00:24

phrontister
Real Member
From: The Land of Tomorrow
Registered: 2009-07-12
Posts: 3,928

Re: Add 13 more and post it forever.

Hi Bobby,

1457? Is that another roundoff error, one that rounds (way) up?

Thanks for that code, btw. Tiny! Not sure if I'll be able to make sense of it.

1469


"The good news about computers is that they do what you tell them to do. The bad news is that they do what you tell them to do." - Ted Nelson

Offline

#114 2010-03-04 11:22:27

bobbym
Administrator
From: Bumpkinland
Registered: 2009-04-12
Posts: 90,784

Re: Add 13 more and post it forever.

I can't make any sense out of it. If you understand a piece of code you wrote 15 minutes ago then you are not doing it right. That's why they call it code.

1457 that was for Tigster. Something to unglue her.


New number:

1482


In mathematics, you don't understand things. You just get used to them.

I agree with you regarding the satisfaction and importance of actually computing some numbers. I can't tell you how often I see time and money wasted because someone didn't bother to run the numbers.

Online

#115 2010-03-04 19:25:17

Tigeree
Member
Registered: 2005-11-19
Posts: 13,848

Re: Add 13 more and post it forever.

Tigster? That's either new or my memory's getting worse all the time. But I have no idea what you're going on about. When was I glued? Gee, I'm not that sticky. Btw, I was going to point out that roundoff error, but I was afraid you would say something condradictory.   

Umm....  1495. I'm so happy I have a Mac, and that these widgets have a calculator. Although I'll have to fix that translator...


People don't notice whether it's winter or summer when they're happy.
~ Anton Chekhov
Cheer up, emo kid.

Offline

#116 2010-03-05 13:00:28

bobbym
Administrator
From: Bumpkinland
Registered: 2009-04-12
Posts: 90,784

Re: Add 13 more and post it forever.

1508 = 5^2 + 6^2 + 7^2 + 8^2 + 9^2 + 12^2 + 22^2 + 25^2


In mathematics, you don't understand things. You just get used to them.

I agree with you regarding the satisfaction and importance of actually computing some numbers. I can't tell you how often I see time and money wasted because someone didn't bother to run the numbers.

Online

#117 2010-03-06 12:09:38

Tigeree
Member
Registered: 2005-11-19
Posts: 13,848

Re: Add 13 more and post it forever.

1508+13=1521


People don't notice whether it's winter or summer when they're happy.
~ Anton Chekhov
Cheer up, emo kid.

Offline

#118 2010-03-06 14:30:25

bobbym
Administrator
From: Bumpkinland
Registered: 2009-04-12
Posts: 90,784

Re: Add 13 more and post it forever.

1534


In mathematics, you don't understand things. You just get used to them.

I agree with you regarding the satisfaction and importance of actually computing some numbers. I can't tell you how often I see time and money wasted because someone didn't bother to run the numbers.

Online

#119 2010-03-07 12:29:34

Tigeree
Member
Registered: 2005-11-19
Posts: 13,848

Re: Add 13 more and post it forever.

1534
+13
____
1547


People don't notice whether it's winter or summer when they're happy.
~ Anton Chekhov
Cheer up, emo kid.

Offline

#120 2010-03-07 14:34:52

bobbym
Administrator
From: Bumpkinland
Registered: 2009-04-12
Posts: 90,784

Re: Add 13 more and post it forever.

1560 That's the one I wanted. A great number, sublime, extraordinary, subtle, magnificent.


In mathematics, you don't understand things. You just get used to them.

I agree with you regarding the satisfaction and importance of actually computing some numbers. I can't tell you how often I see time and money wasted because someone didn't bother to run the numbers.

Online

#121 2010-03-09 00:19:41

phrontister
Real Member
From: The Land of Tomorrow
Registered: 2009-07-12
Posts: 3,928

Re: Add 13 more and post it forever.

bobbym wrote:

1560 That's the one I wanted. A great number, sublime, extraordinary, subtle, magnificent.

A bit cryptic, that, but here's my take on it:

Bobby's talking - in code - about....tulips!

1560 AD: The first tulip bulb is brought from Turkey to the Netherlands (Wikipedia).
A great number: Scads of them at springtime in Holland, in fact.
sublime: Add lime to overly-acidic soil, just below the surface.
extraordinary: Buy 12 ordinary tulips and get one free.
subtle: Tulips generally have only the hint of an odour (Alexander Dumas: "I shall make experiments. With them I shall succeed in imparting scent to the tulip.")
magnificent: Right on! (see piccy)

That's the one I wanted. So you're a tulip-lover, Bobby! smile

I now nearly feel encouraged enough to try and crack bob farey's 'uncrackable' substitution cypher code!

New number: 1573

1573 AD is a well-renowned time in history, marking the 13th year since the first tulip bulb was brought from Turkey to the Netherlands.
Also (according to the Amsterdam Tulip Museum), during that year Pope Maximillian II sent Clusius to Vienna to direct hortus, but eventually his tulip bulbs were stolen.

View Image: Tulips.jpg

Last edited by phrontister (2010-03-09 09:07:09)


"The good news about computers is that they do what you tell them to do. The bad news is that they do what you tell them to do." - Ted Nelson

Offline

#122 2010-03-09 12:56:20

John E. Franklin
Member
Registered: 2005-08-29
Posts: 3,582

Re: Add 13 more and post it forever.

1573
+  13
-------
1586

Wow, amazing photo from the air of the tulip farms!!


igloo myrtilles fourmis

Offline

#123 2010-03-09 13:34:08

bobbym
Administrator
From: Bumpkinland
Registered: 2009-04-12
Posts: 90,784

Re: Add 13 more and post it forever.

Hi phrontister;

That's great figuring and right on the money. That is exactly what I meant.

1599 is the difference of 4 positive squares.

1599 = 400^2 - 1^2
1599 = 68^2 - 55^2
1599 = 268^2 - 265^2
1599 = 800^2 - 799^2


In mathematics, you don't understand things. You just get used to them.

I agree with you regarding the satisfaction and importance of actually computing some numbers. I can't tell you how often I see time and money wasted because someone didn't bother to run the numbers.

Online

#124 2010-03-09 17:59:51

Tigeree
Member
Registered: 2005-11-19
Posts: 13,848

Re: Add 13 more and post it forever.

Pretty.....
Ooh, 1599 how auspicious.

plus thirteen equals....

1612! What a great year that probably was...


People don't notice whether it's winter or summer when they're happy.
~ Anton Chekhov
Cheer up, emo kid.

Offline

#125 2010-03-10 02:19:07

phrontister
Real Member
From: The Land of Tomorrow
Registered: 2009-07-12
Posts: 3,928

Re: Add 13 more and post it forever.

Tigeree wrote:

1612! What a great year that probably was...

It was! That was the year that Edward Wightman was the last person to be burned at the stake for heresy in England! (Wikipedia)

1625.

The sum of the sums of the digits of the different combinations of the numbers comprising the prime factorization of 1625 is 13.


"The good news about computers is that they do what you tell them to do. The bad news is that they do what you tell them to do." - Ted Nelson

Offline

Board footer

Powered by FluxBB