# Math Is Fun Forum

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

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## #1 2020-04-29 23:59:35

tony123
Member
Registered: 2007-08-03
Posts: 225

### ..find X

from Μιχάλης

Last edited by tony123 (2020-04-30 00:00:30)

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## #2 2020-04-30 19:22:57

Bob
Registered: 2010-06-20
Posts: 9,719

### Re: ..find X

hi Tony,

Another great puzzle.  I think I've got a proof for this:

Bob

Children are not defined by school ...........The Fonz
You cannot teach a man anything;  you can only help him find it within himself..........Galileo Galilei
Sometimes I deliberately make mistakes, just to test you!  …………….Bob

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## #3 2020-05-15 05:38:05

anonimnystefy
Real Member
From: Harlan's World
Registered: 2011-05-23
Posts: 16,049

### Re: ..find X

Hi,

Last edited by anonimnystefy (2020-05-15 05:38:20)

Here lies the reader who will never open this book. He is forever dead.
Taking a new step, uttering a new word, is what people fear most. ― Fyodor Dostoyevsky, Crime and Punishment
The knowledge of some things as a function of age is a delta function.

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## #4 2020-05-15 20:36:51

Bob
Registered: 2010-06-20
Posts: 9,719

### Re: ..find X

hi Stefy,

8-3 = 5.  But the diagram shows 8+3.

Draw a line through the centre of the circle, parallel to BE.  Reflect B, and E in that line.

Bob

Children are not defined by school ...........The Fonz
You cannot teach a man anything;  you can only help him find it within himself..........Galileo Galilei
Sometimes I deliberately make mistakes, just to test you!  …………….Bob

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## #5 2020-05-16 07:27:38

anonimnystefy
Real Member
From: Harlan's World
Registered: 2011-05-23
Posts: 16,049

### Re: ..find X

Ahhh, I see it now! Thanks, Bob!

Here lies the reader who will never open this book. He is forever dead.
Taking a new step, uttering a new word, is what people fear most. ― Fyodor Dostoyevsky, Crime and Punishment
The knowledge of some things as a function of age is a delta function.

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