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#26 2011-05-19 08:22:08
- John E. Franklin
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- Registered: 2005-08-29
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Re: Let's make triangular numbers.
351
a triangle with 26 rows, pair them up for 13 pairs of 27.
270 + 81 = 351, yup.
igloo myrtilles fourmis
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#27 2011-05-19 14:41:09
- bobbym
- bumpkin
- From: Bumpkinland
- Registered: 2009-04-12
- Posts: 109,606
Re: Let's make triangular numbers.
378
Is the sum of two other traingular numbers.
378 = Triangular(12) + Triangular(24)
In mathematics, you don't understand things. You just get used to them.
If it ain't broke, fix it until it is.
Always satisfy the Prime Directive of getting the right answer above all else.
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#28 2011-05-25 00:02:10
- Bob
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Re: Let's make triangular numbers.
I see what youre up to here.
Everyone is holding off from posting because you all want to hit post #31.
So Im going to have it this way.
The North Circular Road around inner London = 406
Bob
Children are not defined by school ...........The Fonz
You cannot teach a man anything; you can only help him find it within himself..........Galileo Galilei
Sometimes I deliberately make mistakes, just to test you! …………….Bob
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#29 2011-05-25 00:04:40
- Bob
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Re: Let's make triangular numbers.
Then
(root(4) x 10 + (4 + 5)) x 3 x 5 = 435
Bob
Children are not defined by school ...........The Fonz
You cannot teach a man anything; you can only help him find it within himself..........Galileo Galilei
Sometimes I deliberately make mistakes, just to test you! …………….Bob
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#30 2011-05-25 00:06:44
- Bob
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Re: Let's make triangular numbers.
Triangular 45 with a triangular 6 between = 465
Bob
Children are not defined by school ...........The Fonz
You cannot teach a man anything; you can only help him find it within himself..........Galileo Galilei
Sometimes I deliberately make mistakes, just to test you! …………….Bob
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#31 2011-05-25 00:08:01
- Bob
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Re: Let's make triangular numbers.
496 Arrrrhh! Thats perfect!
Bob
Children are not defined by school ...........The Fonz
You cannot teach a man anything; you can only help him find it within himself..........Galileo Galilei
Sometimes I deliberately make mistakes, just to test you! …………….Bob
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#32 2011-05-25 02:56:40
- bobbym
- bumpkin
- From: Bumpkinland
- Registered: 2009-04-12
- Posts: 109,606
Re: Let's make triangular numbers.
528
2^9 + 2^4 = 528
In mathematics, you don't understand things. You just get used to them.
If it ain't broke, fix it until it is.
Always satisfy the Prime Directive of getting the right answer above all else.
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#33 2011-05-25 08:29:05
- anonimnystefy
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- From: Harlan's World
- Registered: 2011-05-23
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Re: Let's make triangular numbers.
561
if HCF(561,b)=1 then b^560 is congruent to 1 modulo 561
Last edited by anonimnystefy (2011-08-14 22:39:57)
Here lies the reader who will never open this book. He is forever dead.
Taking a new step, uttering a new word, is what people fear most. ― Fyodor Dostoyevsky, Crime and Punishment
The knowledge of some things as a function of age is a delta function.
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#34 2011-05-25 09:10:04
- bobbym
- bumpkin
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- Registered: 2009-04-12
- Posts: 109,606
Re: Let's make triangular numbers.
595
In mathematics, you don't understand things. You just get used to them.
If it ain't broke, fix it until it is.
Always satisfy the Prime Directive of getting the right answer above all else.
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#35 2011-05-25 09:15:28
- anonimnystefy
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Re: Let's make triangular numbers.
630=2*3*3*5*7=97+101+103+107+109+113 which are consecutive primes
Here lies the reader who will never open this book. He is forever dead.
Taking a new step, uttering a new word, is what people fear most. ― Fyodor Dostoyevsky, Crime and Punishment
The knowledge of some things as a function of age is a delta function.
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#36 2011-05-25 09:50:48
- bobbym
- bumpkin
- From: Bumpkinland
- Registered: 2009-04-12
- Posts: 109,606
Re: Let's make triangular numbers.
666
The mark of the beast.
In mathematics, you don't understand things. You just get used to them.
If it ain't broke, fix it until it is.
Always satisfy the Prime Directive of getting the right answer above all else.
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#37 2011-05-25 22:19:21
- anonimnystefy
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Re: Let's make triangular numbers.
703-a Kaprekar number
Last edited by anonimnystefy (2011-05-25 22:22:06)
Here lies the reader who will never open this book. He is forever dead.
Taking a new step, uttering a new word, is what people fear most. ― Fyodor Dostoyevsky, Crime and Punishment
The knowledge of some things as a function of age is a delta function.
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#38 2011-08-14 09:28:39
- anonimnystefy
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Re: Let's make triangular numbers.
740-a non-totient number
Here lies the reader who will never open this book. He is forever dead.
Taking a new step, uttering a new word, is what people fear most. ― Fyodor Dostoyevsky, Crime and Punishment
The knowledge of some things as a function of age is a delta function.
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#39 2011-08-14 18:34:26
- bobbym
- bumpkin
- From: Bumpkinland
- Registered: 2009-04-12
- Posts: 109,606
Re: Let's make triangular numbers.
Hi;
741 a triangular number.
In mathematics, you don't understand things. You just get used to them.
If it ain't broke, fix it until it is.
Always satisfy the Prime Directive of getting the right answer above all else.
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#40 2011-08-14 22:34:40
- anonimnystefy
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Re: Let's make triangular numbers.
oh yes you are right
catching up:
780-also a hexagonal number,Harshad number,sum of ten consecutive primes:
780=59 + 61 + 67 + 71 + 73 + 79 + 83 + 89 + 97 + 101
820-Harshad number:
8+2+0|820
Here lies the reader who will never open this book. He is forever dead.
Taking a new step, uttering a new word, is what people fear most. ― Fyodor Dostoyevsky, Crime and Punishment
The knowledge of some things as a function of age is a delta function.
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#41 2012-07-04 04:58:55
- John E. Franklin
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Re: Let's make triangular numbers.
861 = 41 + 820
41 by 21 = 800 + 1 + 40 + 20
igloo myrtilles fourmis
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#42 2012-07-04 05:24:12
- bobbym
- bumpkin
- From: Bumpkinland
- Registered: 2009-04-12
- Posts: 109,606
Re: Let's make triangular numbers.
Hi;
903 not a prime.
In mathematics, you don't understand things. You just get used to them.
If it ain't broke, fix it until it is.
Always satisfy the Prime Directive of getting the right answer above all else.
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#43 2012-07-04 05:27:26
- anonimnystefy
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- From: Harlan's World
- Registered: 2011-05-23
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Re: Let's make triangular numbers.
946-not a prime either.
Here lies the reader who will never open this book. He is forever dead.
Taking a new step, uttering a new word, is what people fear most. ― Fyodor Dostoyevsky, Crime and Punishment
The knowledge of some things as a function of age is a delta function.
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#44 2012-07-04 05:29:22
- bobbym
- bumpkin
- From: Bumpkinland
- Registered: 2009-04-12
- Posts: 109,606
Re: Let's make triangular numbers.
990 almost a prime.
In mathematics, you don't understand things. You just get used to them.
If it ain't broke, fix it until it is.
Always satisfy the Prime Directive of getting the right answer above all else.
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#45 2012-07-04 05:33:24
- anonimnystefy
- Real Member
- From: Harlan's World
- Registered: 2011-05-23
- Posts: 16,049
Re: Let's make triangular numbers.
1035-first triangular number greater than 1000.
Here lies the reader who will never open this book. He is forever dead.
Taking a new step, uttering a new word, is what people fear most. ― Fyodor Dostoyevsky, Crime and Punishment
The knowledge of some things as a function of age is a delta function.
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#46 2012-07-04 05:36:30
- bobbym
- bumpkin
- From: Bumpkinland
- Registered: 2009-04-12
- Posts: 109,606
Re: Let's make triangular numbers.
1081 also not a prime.
In mathematics, you don't understand things. You just get used to them.
If it ain't broke, fix it until it is.
Always satisfy the Prime Directive of getting the right answer above all else.
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#47 2012-07-04 05:40:46
- anonimnystefy
- Real Member
- From: Harlan's World
- Registered: 2011-05-23
- Posts: 16,049
Re: Let's make triangular numbers.
1128-not not a not-prime
Here lies the reader who will never open this book. He is forever dead.
Taking a new step, uttering a new word, is what people fear most. ― Fyodor Dostoyevsky, Crime and Punishment
The knowledge of some things as a function of age is a delta function.
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#48 2012-07-04 05:42:33
- bobbym
- bumpkin
- From: Bumpkinland
- Registered: 2009-04-12
- Posts: 109,606
Re: Let's make triangular numbers.
1176 add 600 and it has meaning today!
In mathematics, you don't understand things. You just get used to them.
If it ain't broke, fix it until it is.
Always satisfy the Prime Directive of getting the right answer above all else.
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#49 2012-12-13 18:10:59
- mathaholic
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- From: Earth
- Registered: 2012-11-29
- Posts: 3,251
Re: Let's make triangular numbers.
Mathaholic | 10th most active poster | Maker of the 350,000th post | Person | rrr's classmate
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#50 2012-12-13 20:44:41
- bobbym
- bumpkin
- From: Bumpkinland
- Registered: 2009-04-12
- Posts: 109,606
Re: Let's make triangular numbers.
The next triangular number is 1275.
In mathematics, you don't understand things. You just get used to them.
If it ain't broke, fix it until it is.
Always satisfy the Prime Directive of getting the right answer above all else.
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