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: 877
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: 105,243

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.
No great discovery was ever made without a bold guess.

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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: 105,243

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.
No great discovery was ever made without a bold guess.

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#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: 105,243

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.
No great discovery was ever made without a bold guess.

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