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

You are not logged in.

- Topics: Active | Unanswered

**John E. Franklin****Member**- Registered: 2005-08-29
- Posts: 3,588

Neat ! Here's a wacky one:

338

338**338** = 19.5 x 19.5 - (6.5 x 6.5)

338

338

**igloo** **myrtilles** **fourmis**

Offline

**bobbym****Administrator**- From: Bumpkinland
- Registered: 2009-04-12
- Posts: 104,184

351 Yikes!! Talk about unholy.

6^2 + 6^2 + 6^2 + 9^2 + 9^2 + 9^2

and 3 + 5 + 1 = 9

**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**

**phrontister****Real Member**- From: The Land of Tomorrow
- Registered: 2009-07-12
- Posts: 4,374

364 = 111111 in base 3

"The good news about computers is that they do what you tell them to do. The bad news is that they do what you tell them to do." - Ted Nelson

Offline

**bobbym****Administrator**- From: Bumpkinland
- Registered: 2009-04-12
- Posts: 104,184

377

Sum of 2 nice squares.

4^2 + 19^2 = 377 and 11^2 + 16^2 = 377

**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**

**John E. Franklin****Member**- Registered: 2005-08-29
- Posts: 3,588

**390****390****390****390****390**

**igloo** **myrtilles** **fourmis**

Offline

**bobbym****Administrator**- From: Bumpkinland
- Registered: 2009-04-12
- Posts: 104,184

403

Interesting 13 * 31 = 403

7^2 + 7^2 + 7^2 + 16^2 = 403

**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**

**John E. Franklin****Member**- Registered: 2005-08-29
- Posts: 3,588

**416****416****416****416****416**

Note the post #32 is the multiplier. 32 times 13 is 416

**igloo** **myrtilles** **fourmis**

Offline

**bobbym****Administrator**- From: Bumpkinland
- Registered: 2009-04-12
- Posts: 104,184

Yes, good to notice that! Amazingly, the next one 429 is 13 times the post # also.

**In mathematics, you don't understand things. You just get used to them.****If it ain't broke, fix it until it is.**

**Online**

**John E. Franklin****Member**- Registered: 2005-08-29
- Posts: 3,588

**442****442****442****442****442**

**igloo** **myrtilles** **fourmis**

Offline

**MathsIsFun****Administrator**- Registered: 2005-01-21
- Posts: 7,608

455: The year the Ostrogoths conquer Pannonia and Dalmatia (according to Wikipedia).

(Sorry, noemi, I deleted your post because it broke the chain.)

"The physicists defer only to mathematicians, and the mathematicians defer only to God ..." - Leon M. Lederman

Offline

**noemi****Member**- Registered: 2010-01-07
- Posts: 2,333

468

Proverbs** 4** (choose wisdom)

**6**Forsake her not, and she shall preserve thee: love her, and she shall keep thee** 8**Exalt her, and she shall promote thee: she shall bring thee to honour, when thou dost embrace her.

it's ok MathsIsFun.. sorry for taking the liberty

*Last edited by noemi (2010-02-05 09:28:54)*

Offline

**bobbym****Administrator**- From: Bumpkinland
- Registered: 2009-04-12
- Posts: 104,184

481

This one is not the sum of any number of positive cubes, incredible!

But, the sum of the digits is 13.

**In mathematics, you don't understand things. You just get used to them.****If it ain't broke, fix it until it is.**

**Online**

**John E. Franklin****Member**- Registered: 2005-08-29
- Posts: 3,588

**494****494****494****494****494**

**igloo** **myrtilles** **fourmis**

Offline

**bobbym****Administrator**- From: Bumpkinland
- Registered: 2009-04-12
- Posts: 104,184

507

The sum of 8 different squares:

2^2 + 4^2 + 5^2 + 6^2 + 7^2 + 9^2 + 10^2 + 14^2 = 507

**In mathematics, you don't understand things. You just get used to them.****If it ain't broke, fix it until it is.**

**Online**

**John E. Franklin****Member**- Registered: 2005-08-29
- Posts: 3,588

**520****520****520**=(2)(2)(2)(5)(13)**520****520**

**igloo** **myrtilles** **fourmis**

Offline

**bobbym****Administrator**- From: Bumpkinland
- Registered: 2009-04-12
- Posts: 104,184

546

It is the mean of 2 happy numbers, amazing!

**In mathematics, you don't understand things. You just get used to them.****If it ain't broke, fix it until it is.**

**Online**

**John E. Franklin****Member**- Registered: 2005-08-29
- Posts: 3,588

**559****559****559**=(13)(43)**559****559**

*Last edited by John E. Franklin (2010-02-06 13:57:57)*

**igloo** **myrtilles** **fourmis**

Offline

**bobbym****Administrator**- From: Bumpkinland
- Registered: 2009-04-12
- Posts: 104,184

572

Sum of eight squares:

1^2 + 2^2 + 3^2 + 4^2 + 5^2 + 6^2 + 15^2 + 16^2 = 572

**In mathematics, you don't understand things. You just get used to them.****If it ain't broke, fix it until it is.**

**Online**

**John E. Franklin****Member**- Registered: 2005-08-29
- Posts: 3,588

**585****585****585****585****585**

**igloo** **myrtilles** **fourmis**

Offline

**bobbym****Administrator**- From: Bumpkinland
- Registered: 2009-04-12
- Posts: 104,184

598

Sum of 6 cubes.

1^3 + 1^3 + 4^3 + 4^3 + 5^3 + 7^3 = 598

**In mathematics, you don't understand things. You just get used to them.****If it ain't broke, fix it until it is.**

**Online**

**John E. Franklin****Member**- Registered: 2005-08-29
- Posts: 3,588

**611****611****611** = 102 + 204 + 305**611****611**

*Last edited by John E. Franklin (2010-02-08 04:52:33)*

**igloo** **myrtilles** **fourmis**

Offline

**Devantè****Real Member**- Registered: 2006-07-14
- Posts: 6,400

624 = 2[sup]4[/sup] + 2[sup]5[/sup] + 2[sup]6[/sup] + 2[sup]9[/sup]

Offline

**bobbym****Administrator**- From: Bumpkinland
- Registered: 2009-04-12
- Posts: 104,184

637 = 5^3 + 8^3

637 = 2^3 + 2^3 + 4^3 + 5^3 + 6^3 + 6^3

**In mathematics, you don't understand things. You just get used to them.****If it ain't broke, fix it until it is.**

**Online**

**Devantè****Real Member**- Registered: 2006-07-14
- Posts: 6,400

650 = 8[sup]3[/sup] + 2[sup]7[/sup] + 2[sup]3[/sup] + 4[sup]½[/sup]

Offline