# A math puzzle

Discussion in 'Miscellaneous' started by Tiberius, Nov 20, 2012.

1. ### Alidar JarokEverything in moderation but moderationModerator

Joined:
Apr 14, 2003
Location:
Norfolk, VA
Others have explained it, but if you write out the squares for (3 - 4) and (5 - 4) it becomes obvious:

(3 - 4)^2 becomes (3 - 4) (3 - 4)

So it would be:
(3 - 4) (3 - 4) = (5 - 4) (5 - 4)
There's no way for that to turn into
3 - 4 = 5 - 4

2. ### M'SharakDefinitely Herbert. Maybe.Moderator

Joined:
Aug 22, 2002
Location:
Terra Inlandia, Kelvin timeline
I think it's this kind, especially if the ID which goes with the source image is anything to go by.

Joined:
Jan 14, 2004
Location:
Bulent's Cafe
These puzzles usually boil down to division by zero or multiplication by zero in one of the steps. I hadn't seen this variant before.

ETA: Thanks, M'Sharak.

Joined:
May 1, 2011
Location:
milky way, outer spiral arm, Sol 3
me neither. A very nice variation of the old math trick

I had suspected it to be a Salticidae - the eye position is typical. In my country we only have very small black and white striped ones (Salticus scenicus) and even tinier brown ones with 4 dots (Sitticus pubescens). Both species have black eyes with blue reflections. The green reflection in your avatar-spider's eyes is quite attractive