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

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#1 2013-04-19 13:18:39

mathaholic
Member
From: Earth
Registered: 2012-11-29
Posts: 3,246

Add 1, then post a letter.

Start with 1, then add 1, then think of what letter it belongs to.

Letters :
T - Triangular number
P - Prime number
C - Composite number
SQ - Squimintrius number
http://www.mathisfunforum.com/viewtopic.php?id=19233
OJ - Other Julianthemath number
http://www.mathisfunforum.com/viewtopic.php?id=19230
http://www.mathisfunforum.com/viewtopic.php?id=19220 *Already discovered

Example
1 N
Meaning : Nothing from the list
2 P
2 is a prime number

Okay? Start!

1 N


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#2 2013-04-20 00:44:23

Nehushtan
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Registered: 2013-03-09
Posts: 868
Website

Re: Add 1, then post a letter.

Actually 1 is a triangular number.

2 – P


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#3 2013-04-20 15:47:50

mathaholic
Member
From: Earth
Registered: 2012-11-29
Posts: 3,246

Re: Add 1, then post a letter.

Oh, yeah. Why did I forget ?

3 - P


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#4 2013-08-27 16:49:44

magicschoolbus123
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Registered: 2013-08-15
Posts: 18

Re: Add 1, then post a letter.

4-c

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#5 2013-08-27 22:09:35

bobbym
Administrator
From: Bumpkinland
Registered: 2009-04-12
Posts: 104,203

Re: Add 1, then post a letter.

5 P


In mathematics, you don't understand things. You just get used to them.
If it ain't broke, fix it until it is.
A number by itself is useful, but it is far more useful to know how accurate or certain that number is.

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#6 2013-09-27 16:45:01

mathaholic
Member
From: Earth
Registered: 2012-11-29
Posts: 3,246

Re: Add 1, then post a letter.

6 T

1 is triangular
3 " "
6 " "


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#7 2013-09-27 21:37:23

bobbym
Administrator
From: Bumpkinland
Registered: 2009-04-12
Posts: 104,203

Re: Add 1, then post a letter.

7P


In mathematics, you don't understand things. You just get used to them.
If it ain't broke, fix it until it is.
A number by itself is useful, but it is far more useful to know how accurate or certain that number is.

Online

#8 2013-09-28 12:10:41

mathaholic
Member
From: Earth
Registered: 2012-11-29
Posts: 3,246

Re: Add 1, then post a letter.

8C

8 is composite because of its factors: 1, 2, 4, 8

8 is also a vertical infinity!


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#9 2013-09-28 12:13:20

bobbym
Administrator
From: Bumpkinland
Registered: 2009-04-12
Posts: 104,203

Re: Add 1, then post a letter.

9C and a square number too.


In mathematics, you don't understand things. You just get used to them.
If it ain't broke, fix it until it is.
A number by itself is useful, but it is far more useful to know how accurate or certain that number is.

Online

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