Official Riddles Thread

[Brother_Mujahid]

Re: Tagrid's riddles thread!

Jedi . . . . force . . . .way of life. . . . Are you slow or what?

batameez getting cheeky heh

 

[Uthman]

Re: Tagrid's riddles thread!



arrrrrrr! Can't a person be hyper for just one day? Am I usually like this? You tell me!

 

[Brother_Mujahid]

Re: Tagrid's riddles thread!

arrrrrrr! Can't a person be hyper for just one day? Am I usually like this? You tell me!

calm down....... i think you should try getting off to bed since it is late, don't you think?

 

[Ansar Al-'Adl]

Re: Tagrid's riddles thread!


Wow, this thread has gotten very long.

I'll introduce a problem for now. Some of you may already know it.

Take a look at the pattern below:

I won't mention the name of this pattern, because I don't want people cheating on this problem.

Now, for each triangle in the pattern, determine the area that is white. i.e. the first is zero, the second is 1/4,....

If you can do that, give me a formula to calculate the white area of the nth triangle.

 

[Tazkiyahtulnafs]

Re: Tagrid's riddles thread!

i think riddles are cool but i can never understand them so i try my best to stay away from it but its interesting to read it and see the actual answer so ppl who can actually do it masha'Allah thats cool

 

[Muhammad]

Re: Tagrid's riddles thread!



Been trying to work out Ansar's question but I'm quite exhausted now after almost having my head exploded. I am VERY near to the answer I think...I just can't find a way to relate the patterns to the value of 'n'.

The least I can do is to tell the areas then:
1st Triangle = 0
2nd = 1/4
3rd = 7/16
4th = 37/64

If that isn't right I think I'll jump out of a window.

 

[Ansar Al-'Adl]

Re: Tagrid's riddles thread!

Yes, its right, Br. Muhammad. I think I made a mistake in the question about the formula. Two corrections:
-the first triangle is the one with area of 1/4
-derive a formula to find the white area of the next triangle (not needed to relate it to n, only to the area of the previous triangle)

 

[Ansar Al-'Adl]

Re: Tagrid's riddles thread!

No, the first number in the series should be 1/4, not zero. But either way, since we're asking for a recursive formula, it shouldn't make a difference.

 

[Muhammad]

Re: Tagrid's riddles thread!



Well done for trying Br zAK although I have no idea whether its right or not since my brain is switched off.

 

[Ra`eesah]

Re: Tagrid's riddles thread!

Assalamu'Alaykum

can we get another riddle meantime?

 

[The Ruler]

Re: Tagrid's riddles thread!



I'm back..........got only one more exam to go and that is the english writing paper.
got nothing to revise so i just thought that i might come and post some riddles......
OK now lets see........
[font=Arial, Helvetica, sans-serif][/font]
[font=Arial, Helvetica, sans-serif]LISA IS LAYING ON THE COUCH ASLEEP AND BOB IS ON THE FLOOR DEAD IN A PUDDLE OF WATER WHAT HAPPENED?[/font]

Wassalam
:sister:

 

[Ra`eesah]

Re: Tagrid's riddles thread!

Assalamu'ALaykum

he killed himself? mg:

 

[Mr. Baldy]

Re: Tagrid's riddles thread!

aslaam alykum,

BOB is a fish, his bowl fell of the table therefore water and lisa is a human and she knocked the bowl of the table?

waalykum aslaam

 

[Ansar Al-'Adl]

Re: Tagrid's riddles thread!

Sorry for the delayed response.

Lets assume Number of White Blocks in the triangle be "X"
n total Number of Blocks be "Y"

so the for the first triangle its :
X/Y = 1/4

now to get the number for the next triangle i got the forumla :

[3x+y]/4y

So you're saying that
n=3x+y
........... 4y

where x is the numerator of the previous term, and y is the denominator. Interesting way to tackle the problem.

I'll show how I did it.

If you look at the pattern, you notice right away that the denominator in each term increases by multiples of 4. So I said for the nth term, the denominator is 4^n.

My formula was:

tn= (3^n-1) + tn-1
..............4^n

Where tn is the nth term, and tn-1 is the previous term.


Great job, br. Zak!

 

[Ansar Al-'Adl]

Re: Tagrid's riddles thread!

btw its called the sierpinski triangle.

 

[Ra`eesah]

Re: Tagrid's riddles thread!

Assalamu'Alaykum


interesting.... hmmmmmmmmmmmm



a fish eh.

 

[Ansar Al-'Adl]

Re: Tagrid's riddles thread!

aslaam alykum,

BOB is a fish, his bowl fell of the table therefore water and lisa is a human and she knocked the bowl of the table?

waalykum aslaam

Lisa is a cat, I believe.

 

[The Ruler]

Re: Tagrid's riddles thread!

aslaam alykum,

BOB is a fish, his bowl fell of the table therefore water and lisa is a human and she knocked the bowl of the table?

waalykum aslaam

quite right.........

Lisa is a cat, I believe.

thats correct...

nxt.........

[font=Arial, Helvetica, sans-serif]what is white when its dirty and black when its clean? (besides charcoal)[/font]

Wassalam
:sister:

 

[Z]

Re: Tagrid's riddles thread!

Asalamu Alaikum

A blackboard!

Now say well done to me! Never mind who gets it after!

 

[fazz]

Re: Tagrid's riddles thread!

u and ur redilles. tell me da answer not bothered to think after sats