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

You are not logged in.

- Topics: Active | Unanswered

Pages: **1**

**uzurpatorul****Member**- Registered: 2009-06-25
- Posts: 11

Diophantus, the Greek mathematician known as the "Father of Algebra", supposedly had the following inscribed on his tombstone:

"Diophantus passed 1/6th of his life in childhood, 1/12th in youth, and 1/7th more as a bachelor.

Five years after his marriage, there was born a son who died four years before his father, at half his father's age."

How old was Diophantus when he died?

Offline

**bobbym****Administrator**- From: Bumpkinland
- Registered: 2009-04-12
- Posts: 87,164

Hi uzurpatorul;

*Last edited by bobbym (2009-07-19 18:42:22)*

**In mathematics, you don't understand things. You just get used to them.Of course that result can be rigorously obtained, but who cares?Combinatorics is Algebra and Algebra is Combinatorics.**

Offline

**phrontister****Real Member**- From: The Land of Tomorrow
- Registered: 2009-07-12
- Posts: 3,848

That was a nice puzzle, uzurpatorul!

It took a bit of head-scratching before I could find an algebraic solution, but I finally got there.

Same answer as Bobby.

*Last edited by phrontister (2009-07-21 04:42:35)*

"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

**guin****Member**- Registered: 2013-06-09
- Posts: 1

I've worked it out backwards, but could someone please help me with the algebraic working?

I'm getting stuck on finding an LCD...should it be 28?

Offline

**bobbym****Administrator**- From: Bumpkinland
- Registered: 2009-04-12
- Posts: 87,164

**In mathematics, you don't understand things. You just get used to them.Of course that result can be rigorously obtained, but who cares?Combinatorics is Algebra and Algebra is Combinatorics.**

Offline

Pages: **1**