Math Is Fun Forum

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

You are not logged in.

#101 Re: Dark Discussions at Cafe Infinity » Unbelievably fast mental calculations! » 2007-09-16 01:12:35

I've tried hands-on an abacus, and I can't even do

5
4
3
---


in 10 seconds... I'm horrible at it, sometimes even forgetting the proper rules!

#102 Re: Help Me ! » Need ideas!! » 2007-09-15 20:23:57

Well, my idea is much too simple for 13 year olds, theyre meant for 10 to 11 year olds. You are from Methodist Girls' School right? Shouldn't be a problem for students there...

#103 Re: Dark Discussions at Cafe Infinity » Haikus » 2007-09-15 20:16:30

shocamefromebay,
has got many nice haikus
shared here at this board.

#104 Re: Dark Discussions at Cafe Infinity » Wikipedia 2 Million Articles » 2007-09-15 20:14:51

because it's free and many millions come to it to read stuff.

#105 Re: Puzzles and Games » DROD » 2007-09-15 20:12:58

Thanks, I just completed it big_smile

#106 Re: Puzzles and Games » Word puzzles » 2007-09-15 20:12:28

shouldn't be. qalamadan's plural shouldn't be with s if I remember correctly.

#108 Re: Maths Is Fun - Suggestions and Comments » Polynomials » 2007-09-15 20:07:00

actually, what's the limit to the number of terms? you could include it.

#109 Re: Maths Is Fun - Suggestions and Comments » Rational and Irrational Numbers » 2007-09-15 01:10:29

hey, why don't you include why he was drowned? because he was irrational!

#110 Re: Puzzles and Games » DROD » 2007-09-15 01:02:55

Oh, I am lousy at it, and I got stuck at once south in level 2 because I can't solve it... Anyone can tell me how to? mad

#111 Re: Puzzles and Games » Add ABC + DEF = GHI. Also, ADG + BEH = CFI » 2007-09-15 00:58:55

Michaelangelo wrote:

ABC + DEF = GHI

(and)

ADG + BEH = CFI

where each letter represents a number 1-9.

Can you figure it out?

hmmm....
How about this?

 ABC
+DEF
----
 GHI

and this

 ADG
+BEH
----
 CFI

That'll make it easier...:)

#112 Re: Puzzles and Games » let's make a rainbow!! » 2007-09-15 00:56:36

so what is the next color/colour after blue? What happens if we don't get the color/colour right before you tell us? tongue

#114 Re: Help Me ! » i want to get a head start on... » 2007-09-14 23:55:07

oh, so that's unsolvable. But it would be if I stated that the denominators were equal, right?

#115 Re: This is Cool » Do you want to participate in a competition? » 2007-09-14 23:53:08

exactly, Anthony, have you any

at all? What's you IQ?

#116 Re: Help Me ! » Need ideas!! » 2007-09-14 18:56:53

How about an investigation? Say... make a dog walking bussiness. There are certain restrictions, so certain dogs cannot be walked with each other. Try to find a least number of trips that the person can walk the dogs in?

#117 Re: Help Me ! » i want to get a head start on... » 2007-09-14 18:54:38

So let's say a complicated one like(maybe not so complicated)


Solve
in terms of

we can solve
in terms of
straight away by using

and now

Stop here, I have no idea on how to continue? Can someone solve it for me? It'll be useful for me and lightning if there's an explanation. dunno

#119 Re: This is Cool » Do you want to participate in a competition? » 2007-09-14 16:45:43

And dots can stretch the page, Anthony, and we certainly don't want that.

#122 Re: Maths Is Fun - Suggestions and Comments » Fraction Number Line » 2007-09-14 02:14:33

maybe you could include a selection to what fractons to show?

#123 Re: This is Cool » Domestos Kills Germs! » 2007-09-13 01:50:50

That's... logic? I don't think so.

#125 Re: Help Me ! » i want to get a head start on... » 2007-09-13 01:24:48

so, we have to eliminate other figures to achieve unknowns?

lightning, we have to solve (or get) things known as unknowns (funny...) and denoted as a letter such as

or
.

Board footer

Powered by FluxBB