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

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

mathaholic
Member
From: Earth
Registered: 2012-11-29
Posts: 3,247

### 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

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
Member
Registered: 2013-03-09
Posts: 882
Website

### Re: Add 1, then post a letter.

Actually 1 is a triangular number.

2  P

Blog

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

mathaholic
Member
From: Earth
Registered: 2012-11-29
Posts: 3,247

### 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
Member
Registered: 2013-08-15
Posts: 18

4-c

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

bobbym
From: Bumpkinland
Registered: 2009-04-12
Posts: 107,133

### 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.
Always satisfy the Prime Directive of getting the right answer above all else.

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

mathaholic
Member
From: Earth
Registered: 2012-11-29
Posts: 3,247

### 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
From: Bumpkinland
Registered: 2009-04-12
Posts: 107,133

### 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.
Always satisfy the Prime Directive of getting the right answer above all else.

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

mathaholic
Member
From: Earth
Registered: 2012-11-29
Posts: 3,247

### 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!

Mathaholic | 10th most active poster | Maker of the 350,000th post | Person | rrr's classmate

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

bobbym
From: Bumpkinland
Registered: 2009-04-12
Posts: 107,133

### 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.
Always satisfy the Prime Directive of getting the right answer above all else.

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