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Anatoly

Guest

lets have some maths

1) on how many nils does the number 100! ends?
2) How many times can you subtract 6 from 36?
3) How to explain 1+2+3...+100? What's the soltuion? Which formula is used?

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Solution 1
100! ends on 24 nils because every 5 times the faktorial gets one nil more, but every 25 times it gets 2 nils. Alsoa  factorial can't end on 5 nils

Solution 2
Only 1 time, bcause the next time you will substract from 30,a nd not from 36. Who says "6 times" is silly. Who says "unlimited times" haven't got logic, but is smart

Solution 3
Formula is n(n+1)/2 = n is 100 (1+2+3..n so n is 100) 100*101/2 we do 50*101 and we get 5050

Create your own cool math questions in this topic!

Abelysk

Guest

Re: lets have some maths

What's the soltuion?

I don't know. What's a soltuion?

Gosha

Member

From: Russia

Joined: 2015-03-15

Posts: 6,211

Re: lets have some maths

Okay.

Where did you get it?
and why?

Evilbunny

Member

From: The bottom of my heart

Joined: 2015-02-25

Posts: 1,276

Re: lets have some maths

2) How many times can you subtract 6 from 36?

Solution 2
Only 1 time, bcause the next time you will substract from 30,a nd not from 36. Who says "6 times" is silly. Who says "unlimited times" haven't got logic, but is smart

36-6=30 36-6=30 36-6=30 36-6=3036-6=30 36-6=30 36-6=30 36-6=30 36-6=30 36-6=30 36-6=30 36-6=30 36-6=30 36-6=30 36-6=30 36-6=30
What do you mean I can only do that once, you CAN do it infinite times.

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Evilbunny (in cursive)

CatoniC

Formerly Elizabeth53999

From: sleepys

Joined: 2015-08-21

Posts: 512

Re: lets have some maths

2) How many times can you subtract 6 from 36?

666 times

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Awesomenessgood

Member

Joined: 2015-08-06

Posts: 1,666

Re: lets have some maths

Expand (n-a)(n-b)(n-c)(n-d)(n-e)...(n-y)(n-z)

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lunchbox

sthegreat

Member

Joined: 2015-04-25

Posts: 409

Re: lets have some maths

Expand (n-a)(n-b)(n-c)(n-d)(n-e)...(n-y)(n-z)

(   n   -   a   )   (   n   -   b   )   (   n   -   c   )   (   n   -   d   )   (   n   -   e   )   .   .   .   (   n   -   y   )   (   n   -   z   )

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AlphaJon

Member

From: Who knows

Joined: 2015-07-21

Posts: 1,297

Re: lets have some maths

Expand (n-a)(n-b)(n-c)(n-d)(n-e)...(n-y)(n-z)

0, because at some point you get (n-n), which is 0, so the rest is irrelevant. But I like sthegreat's answer more

TaskManager

Formerly maxi123

From: i really should update this

Joined: 2015-03-01

Posts: 9,465

Re: lets have some maths

Expand

▼i had to

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Pingohits

Banned

From: aids lizard

Joined: 2015-02-15

Posts: 7,591

Re: lets have some maths

what is the reprcicol of nine and eleventy two

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sthegreat

Member

Joined: 2015-04-25

Posts: 409

Re: lets have some maths

what is the reprcicol of nine and eleventy two

owt ytnevele dna enin

I like math

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Slabdrill

Formerly 12345678908642

From: canada

Joined: 2015-08-15

Posts: 3,402

Website

Re: lets have some maths

how many seconds are there in a year?
if you have a bike that was wheels of 2 inches in diameter and you ride it through a hectometer, how many full rotations of the wheel occur?
if you can ride the bike 6 miles per hour, how long does it take to go through the hectometer?
simplify x(xy)+y(x^(2y))+xy(6x-y).
you have a 6 by 12 rectangle and you round off the two sides with a perfect rounded edge. What's the perimeter/area of the rounded rectangle.

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suddenly random sig change

Sensei1

Member

From: The land of saunas

Joined: 2015-02-16

Posts: 1,112

Re: lets have some maths

how many seconds are there in a year?

12, right?
January 2nd, February 2nd, March 2nd...

Gosha

Member

From: Russia

Joined: 2015-03-15

Posts: 6,211

Re: lets have some maths

how many seconds are there in a year?

12, right?
January 2nd, February 2nd, March 2nd...

2 , 12 , 20-29

there are 12 "2" in year
there are 12 "12" in year
12 x 10 - 1 (29 feb)
there are 119 "20-29" in year
so..
133

There are 133.

Or 31 536 000

Pingohits

Banned

From: aids lizard

Joined: 2015-02-15

Posts: 7,591

Re: lets have some maths

IF YOU COLLECT THE MOONSHINE OFF OF A GARBAGE PAIL WHAT IS THE COMPOUND FORMULA OF DIETHYLAMINE AND AN OYSTER

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Jedpogi

Member

From: there

Joined: 2015-02-18

Posts: 524

Re: lets have some maths

this reply has five words

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02/04/2021: Sorry for being an unfunny piece of ****, no-good human trash. I hate my **** life.

Kaslai

Official Caroler

From: SEAͩT̓͑TLͯͥͧͪ̽ͧE͑̚

Joined: 2015-02-17

Posts: 787

Re: lets have some maths

Who says "unlimited times" haven't got logic

So I haven't any logic?

RavaTroll

Member

From: France

Joined: 2015-02-16

Posts: 820

Re: lets have some maths

why is this thread full of terrible puns and jokes ?

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Trolls be in da place, mon !

sthegreat

Member

Joined: 2015-04-25

Posts: 409

Re: lets have some maths

why is this thread full of terrible puns and jokes ?

Because it's not really realistic to ask actual math questions because everyone here is in different levels of math.

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Different55

Forum Admin

Joined: 2015-02-07

Posts: 16,575

Re: lets have some maths

If sin(x) = 3/5 and sin(y) = 6/11 what are the values of sin(x+y) and tan(x+y) without using a calculator.

Asking for a friend.

Wow you're right this is so much better than math puns.

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"Sometimes failing a leap of faith is better than inching forward"
- ShinsukeIto

TaskManager

Formerly maxi123

From: i really should update this

Joined: 2015-03-01

Posts: 9,465

Re: lets have some maths

If sin(x) = 3/5 and sin(y) = 6/11 what are the values of sin(x+y) and tan(x+y) without using a calculator.

Asking for a friend.

Wow you're right this is so much better than math puns.

i have a formula for that somewhere
but im too lazy to find it

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Creature

Member

From: The Dark Web

Joined: 2015-02-15

Posts: 9,658

Re: lets have some maths

Do you like calculations? Then do this:

a) Think about 5.
b) Elevate it by 5, 5 times.
c) Take the result.
d) Elevate it by 5, the number of times being the result you got (c).
e) Take the result.
f) Elevate it by 5, again, the number of times being the result you got (e).
g) Keep doing this until you get to a total of (c) calculations.
h) Take the result.
i) Do it all again, but replace every 5 with the result you got (h).
j) Take the result.
k) Do it all again, but use the (j) result.
l) Keep doing this until you get to a total of (j) operations.

I recommend you do this.

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This is a false statement.

Anatoly

Guest

Re: lets have some maths

prove that please We all know 2+2=4, but i get 5...
2+2 =
4-9/2+9/2 =
root{(4-9/2) ^ 2} + 9/2 =
root{16- 2* 4 * 9/2 + (9/2) ^ 2} + 9/2 =
root{16-36+(9/2)^2} + 9/2 =
root{-20+(9/2)^2} + 9/2 =
root{25-45 + (9/2) ^ 2} + 9/2 =
root{5^2 - 2 * 5 * 9/2 + (9/2)^2} +9/2

and here it goes... Befor we had
root{16- 2* 4 * 9/2 + (9/2) ^ 2} + 9/2 =
now:
root{5^2 - 2 * 5 * 9/2 + (9/2)^2} +9/2

then we get:
= root{(5-2/9)^2} + 9/2 =
5 - 9/2 + 9/2 =
5

This makes sence, where is my mistake??
5 = 4 or what??

Anatoly

Guest

Re: lets have some maths

2) How many times can you subtract 6 from 36?

Solution 2
Only 1 time, bcause the next time you will substract from 30,a nd not from 36. Who says "6 times" is silly. Who says "unlimited times" haven't got logic, but is smart

36-6=30 36-6=30 36-6=30 36-6=3036-6=30 36-6=30 36-6=30 36-6=30 36-6=30 36-6=30 36-6=30 36-6=30 36-6=30 36-6=30 36-6=30 36-6=30
What do you mean I can only do that once, you CAN do it infinite times.

you have 36 banas, you give 6 away, you won't get 36 bannas, because 36 - 6 =30, not 36!! (Or if you give me a formula like above then i might belive you!)

TaskManager

Formerly maxi123

From: i really should update this

Joined: 2015-03-01

Posts: 9,465

Re: lets have some maths

4-2/9+2/9 =
root{(4-9/2) ^ 2} + 9/2

why

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