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

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#1 Re: Jokes » What's the most annoying song in the world? » 2018-01-21 22:29:32

Hmm, according to me, this song is the most annoying song ever. How the hell did it get 32 Million views???

The song is Selfie maine leli aaj (I took a selfie today) by Dhinchak Pooja.

#2 Re: Puzzles and Games » A little nice puzzle » 2018-01-16 07:29:11

ganesh wrote:

I asked this problem long time back when I was young.

Oh really? Actually I heard this problem from my friend.

#3 Puzzles and Games » A little nice puzzle » 2018-01-15 23:00:15

Replies: 2

You are given 8 balls. One of the balls is heavier than the rest which are all the same weight. It is impossible to determine the heavier ball by the shape, size or lifting it up. You are given a 2-plated beam balance. Using the balance twice, how can you determine which ball is heavier.

#4 Maths Is Fun - Suggestions and Comments » Banning new members » 2018-01-10 00:33:17

Replies: 3

Why are so many advertisers joining the forum nowadays and getting banned due to advertising there own math websites?

#5 Re: Help Me ! » Geometry Homework Help » 2018-01-10 00:30:27

bob bundy wrote:

There is a way.  Don't want to advertise it (no pun intended smile )

Please can we let this thread fade away so it doesn't give anything away.  Thanks.


A better option is to close this topic.

Administrators and moderators have access to additional information about each member

Do they include e-mail address also?

#6 Re: Help Me ! » Finding an equation by fixed-point method » 2018-01-04 23:04:56

Hannibal lecter wrote:

Hi, how to find the root of the following function by fixed point iteration method ?


AFAIT, its this function:

#7 Re: Help Me ! » what is the solution for f(x) = exp(-x) ? » 2018-01-04 23:00:18

zetafunc wrote:

Where did you get 0.571143115080177 from?

See the graph which Ganesh posted. You will see that it converges down to X-axis and almost touches it at that value.

#9 Re: Introductions » All Hail the Super Member!!! » 2017-11-29 22:58:31

You are in this forum for almost 8.5 yrs!

#12 Re: Help Me ! » Geometry help » 2017-10-30 03:24:19

Hi alter ego,

You need to post a diagram for this as well as the other thread. I think you missed it.

#14 Re: Maths Is Fun - Suggestions and Comments » Remainder Theorem » 2017-10-07 22:44:15

Its easy.

Don't you think it should be in Help Me.

#15 Re: Help Me ! » A simple question is not being able to solve by me » 2017-10-04 18:31:35

bob bundy wrote:

And is that xyz = 1 rather than abc = 1  ?


Yeah it is.

I solved it but it took 2 whole pages to solve it. Phew! I finally got the numerator and denominator as equal and hence it is equal to 1.

#16 Re: Help Me ! » A simple question is not being able to solve by me » 2017-10-03 22:51:55

I'm sorry I gave the question wrong, I edited it . Now see.

#22 Re: Help Me ! » geometry » 2017-10-03 01:38:44

Oh wow,

It seems ages since Ganesh has posted something in Help Me. He usually used to post in Ganeh's Puzzles and Dark Discussions at Cafe Infinity.

If a cone and a cylinder have the same radius and height, you'd expect the volume of the cone to be less than the cylinder.  But why one third and not some other fraction, or maybe even an amount unconnected with the cylinder's volume?
I can show this if you know some calculus; specifically a little bit of integration. Post back if you want to see this.

Yeah, I too want to know about it.

#23 Re: Help Me ! » Trapezium » 2017-10-03 01:35:49

a + d = 4
b + c = 6

How did you get these 2 equations?

#24 Re: Help Me ! » Trapezium » 2017-10-02 21:20:46

After 15 min of thinking I found this but I don't know whether its correct or not...


#25 Re: Maths Teaching Resources » Maths Books » 2017-09-26 01:12:01

iamaditya, it has been four and a half months since your last reply to bobbym, who has since died.

Yeah I know, (and I was the first few of them to know about it) so I was not expecting a reply. I wanted other members to give answers but till now I haven't received a single one.

The answer to # 15 is log(12).

Yes it's correct.

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