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

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#43326 Re: Dark Discussions at Cafe Infinity » Cow Bull 1 » 2005-12-12 20:20:13

Cow Bull 7(hosted by krassi_holmz) :-
Guess 3 :- 2319

#43327 Re: Jai Ganesh's Puzzles » Problems and Solutions » 2005-12-09 20:24:46

Problem # k + 60

Three men walk into a motel and ask for a room. The desk clerk says a room is $30 so each man pays $10 towards the cost. Later, the clerk realizes he made a mistake, that the room should have been $25. He calls the bell boy over and asks him to refund the other $5 to the three men. The bellboy, not wanting to mess with a lot of change dividing the $5 three ways, decides to lie about the price, refunding each man $1 and keeping the other $2 for himself. Ultimately each man paid $9 towards the room and the bellboy got $2, totaling $29. But the original charge was $30, where did the extra $1 go?

#43328 Re: Introductions » Здрасти by krassi_holmz » 2005-12-09 20:19:48

Хорошие пожелания к Вам!

#43329 Re: Dark Discussions at Cafe Infinity » Cow Bull 1 » 2005-12-09 20:10:40

Okay, lets admit and concede, Mathsy is too good at it....
I throw open a challenge....
Someone guess this within 5 guesses.....
# Cow Bull 7

#43330 Re: This is Cool » One divided by Infinity » 2005-12-09 00:48:15

Me!

|kn   kn   kn   fool            avoid|
|kn   k     kn   student      teach|
|k     kn   k     sleeping     wake|
|k     k     k     wise man  follow|

kn = knows not, k = knows

MathsIsFun, I knew this before. But I didn't know it was a Sanskrit saying.

#43335 Re: Help Me ! » :P i need help with maths homework » 2005-12-08 16:25:46

Attempted spam? I don't get you, mathsyperson.

#43336 Re: Jokes » Clean Jokes » 2005-12-08 16:22:47

Another stupid question:
A man was born in 1969 and died in 1989. He was 25 years of age when he died. How?

#43337 Re: Dark Discussions at Cafe Infinity » Cow Bull 1 » 2005-12-08 16:18:09

Guess 5 : 4096 : BBBB
Bull's eye smile
Guess 6 : 1263 : Not required as Jims already hit the bull's eye.

Winners of Cow Bull # 1 to 5
Cow Bull # 1 : Jims, mathsyperson.
Cow Bull # 2 : ganesh
Cow Bull # 3 : mathsyperson
Cow Bull # 4 : justlookingforthemoment
Cow Bull # 5 : Jims

Cow Bull # 6 : Anyone willing to host?

#43338 Re: Jai Ganesh's Puzzles » Problems and Solutions » 2005-12-08 16:10:38

To irspow:
Sir,
In your solution for Problem # k + 58,
you have posted
A = sh/2 = [3a(3a^2)^(1/2)] / 4 = a( 3 + 3^(1/2)) / 4 ≈ 1.183a
It should be [3√(3)*a²]/4.
Solution to problem # k + 59 is not correct.

#43342 Re: Help Me ! » Question From an Email » 2005-12-07 23:11:15

Had that condition not been given, the solution would have been simple, as you had posted, Sir. The dome is not a perfect hemishphere. It resembles an ellipsoid.
Maybe, this link would be of some help in determining the surface area. smile

#43344 Re: Help Me ! » Question From an Email » 2005-12-07 23:00:19

And the highest point in the centre is 5 metres high.
The roof is an exact half of eclipse shape.

Contradiction!

#43348 Re: Jai Ganesh's Puzzles » Problems and Solutions » 2005-12-07 21:40:04

Problem # k + 59

A sum of money invested for a certain number of years at 8% p.a. simple interest grows to $180. The same sum of money invested for the same number of years at 4% p.a. simple interest grows to $120 only. For how many years was the sum invested?

#43349 Re: Jokes » Clean Jokes » 2005-12-07 20:08:07

Good thinking, justlookingforthemoment!

#43350 Re: Dark Discussions at Cafe Infinity » Cow Bull 1 » 2005-12-07 19:49:16

I am almost certain, the winner of CB3 is,
justlookingforthemoment.
The official announcement from Mathsyperson is awaited.

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