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#1 2011-03-02 01:55:32
- John E. Franklin
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Let's make triangular numbers.
The first triangular number is 1.
To continue this thread, simply
add 2, then 3, then 4, on forever
to make triangular numbers.
So I'll go first:
1
(one)
Imagine for a moment that even an earthworm may possess a love of self and a love of others.
#2 2011-03-02 12:28:07
- bobbym
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Re: Let's make triangular numbers.
3 is triangular and prime.
In mathematics, you don't understand things. You just get used to them.
Probability is the most important concept in modern science, especially as nobody has the slightest notion what it means.
90% of mathematicians do not understand 90% of currently published mathematics.
#3 2011-03-03 04:17:16
- G-man
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Re: Let's make triangular numbers.
6 Its triangular & first composite which isn't a square.
Maths!......
#4 2011-03-03 08:41:30
- bobbym
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Re: Let's make triangular numbers.
10 - The number of balls in a 10 ball rack. The first 2 digit triangular number! Also it is larger than 1 - 9 and has a zero in it.
In mathematics, you don't understand things. You just get used to them.
Probability is the most important concept in modern science, especially as nobody has the slightest notion what it means.
90% of mathematicians do not understand 90% of currently published mathematics.
#5 2011-03-03 11:31:13
- John E. Franklin
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Re: Let's make triangular numbers.
15
5 x (6/2)
Imagine for a moment that even an earthworm may possess a love of self and a love of others.
#6 2011-03-03 14:17:51
- bobbym
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Re: Let's make triangular numbers.
21 everybody's favorite number
In mathematics, you don't understand things. You just get used to them.
Probability is the most important concept in modern science, especially as nobody has the slightest notion what it means.
90% of mathematicians do not understand 90% of currently published mathematics.
#7 2011-03-03 14:43:46
- MathsIsFun
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Re: Let's make triangular numbers.
28: has factors 1, 2, 4, 7, 14, 28 and reminds me of February
"The physicists defer only to mathematicians, and the mathematicians defer only to God ..." - Leon M. Lederman
#8 2011-03-03 14:53:48
- G-man
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Re: Let's make triangular numbers.
36
square of product of first two consecutive primes.
Maths!......
#9 2011-03-03 20:13:39
- bobbym
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Re: Let's make triangular numbers.
45 - ( Colt ) the best automatic ever made.
In mathematics, you don't understand things. You just get used to them.
Probability is the most important concept in modern science, especially as nobody has the slightest notion what it means.
90% of mathematicians do not understand 90% of currently published mathematics.
#11 2011-03-04 17:17:35
- bobbym
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Re: Let's make triangular numbers.
66 - the 11 the triangular number and the name of a now infamous highway here in the southwest.
In mathematics, you don't understand things. You just get used to them.
Probability is the most important concept in modern science, especially as nobody has the slightest notion what it means.
90% of mathematicians do not understand 90% of currently published mathematics.
#12 2011-03-07 01:21:55
- matthen
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Re: Let's make triangular numbers.
78
note these triangular numbers go:
...,45,55,66,78,91, quite cool that 4,5,6,7,8,9 appear in order with no interruptions!
#13 2011-03-07 04:49:43
- bobbym
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Re: Let's make triangular numbers.
91 The most powerful triangular number and the one that wants to be a square the most. Also it is the only one that is 7 * 13.
In mathematics, you don't understand things. You just get used to them.
Probability is the most important concept in modern science, especially as nobody has the slightest notion what it means.
90% of mathematicians do not understand 90% of currently published mathematics.
#14 2011-03-23 10:31:19
- John E. Franklin
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Re: Let's make triangular numbers.
105=14+91
(14/2)*15
Imagine for a moment that even an earthworm may possess a love of self and a love of others.
#15 2011-03-23 11:48:39
- bobbym
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Re: Let's make triangular numbers.
The 15th triangular number is 120. Which is also 5!.
In mathematics, you don't understand things. You just get used to them.
Probability is the most important concept in modern science, especially as nobody has the slightest notion what it means.
90% of mathematicians do not understand 90% of currently published mathematics.
#16 2011-03-23 12:58:55
- G-man
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Re: Let's make triangular numbers.
136.........1, 3 & 6 are first 3 triangle numbers.
Maths!......
#17 2011-03-23 13:28:21
- bobbym
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Re: Let's make triangular numbers.
153
Is a square away from 2 squares. 12^2 + 3^3 = 153 and 13^2 - 4^2 = 153
In mathematics, you don't understand things. You just get used to them.
Probability is the most important concept in modern science, especially as nobody has the slightest notion what it means.
90% of mathematicians do not understand 90% of currently published mathematics.
#18 2011-04-06 00:21:55
- John E. Franklin
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Re: Let's make triangular numbers.
171
153 + 18 = 171
(19 x 18) / 2
Imagine for a moment that even an earthworm may possess a love of self and a love of others.
#19 2011-04-06 00:50:56
- bobbym
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Re: Let's make triangular numbers.
190
The famous 190 Bowery St.
http://nymag.com/realestate/vu/2008/09/50481/
In mathematics, you don't understand things. You just get used to them.
Probability is the most important concept in modern science, especially as nobody has the slightest notion what it means.
90% of mathematicians do not understand 90% of currently published mathematics.
#20 2011-04-17 06:29:10
- John E. Franklin
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Re: Let's make triangular numbers.
210
210 = 190 + 20
210 = 14 x 15 = (21 x 20) / 2 on this post # 20.
Imagine for a moment that even an earthworm may possess a love of self and a love of others.
#21 2011-04-17 06:51:43
- bobbym
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Re: Let's make triangular numbers.
231
One of the permutations of 123.
In mathematics, you don't understand things. You just get used to them.
Probability is the most important concept in modern science, especially as nobody has the slightest notion what it means.
90% of mathematicians do not understand 90% of currently published mathematics.
#22 2011-04-17 09:34:54
- John E. Franklin
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Re: Let's make triangular numbers.
253
253 = 231 + 22 = (1 + 22)+(2 + 21)+...(9 + 14)+(10 + 13)+(11 + 12)
= 11 x 23 = (23 x 22) / 2
This triangular number can form a digital triangle with 22 rows in 3 angles differing by 120 degrees.
Imagine for a moment that even an earthworm may possess a love of self and a love of others.
#23 2011-04-17 12:40:42
- bobbym
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Re: Let's make triangular numbers.
276
And that is real close to 253.
In mathematics, you don't understand things. You just get used to them.
Probability is the most important concept in modern science, especially as nobody has the slightest notion what it means.
90% of mathematicians do not understand 90% of currently published mathematics.
#24 2011-04-18 10:13:04
- John E. Franklin
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Re: Let's make triangular numbers.
300
Yeah 300!!!! 276 + 24. (25 x 24) / 2 A triangle with 24 rows.
Imagine for a moment that even an earthworm may possess a love of self and a love of others.
#25 2011-04-18 10:20:22
- bobbym
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Re: Let's make triangular numbers.
325 which is 3*5 - 2 = 13.
In mathematics, you don't understand things. You just get used to them.
Probability is the most important concept in modern science, especially as nobody has the slightest notion what it means.
90% of mathematicians do not understand 90% of currently published mathematics.