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/sci/ - Science & Math

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2645031 No.2645031 [Reply] [Original]

Let's see how smart /sci/ really is.

Every month, a girl gets allowance. Assume last year she had no money, and kept it up to now. Then she spends 1/2 of her money on clothes, then 1/3 of the remaining money on games, and then 1/4 of the remaining money on toys. After she bought all of that, she had $7777 left. Assuming she only gets money by allowance, how much money does she earn every month?

>> No.2645039

Way too much.

>> No.2645052
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2645052

and where does the extra 8.3% come from exactly?

>> No.2645058

>earn

>> No.2645063

Easy. None.
You don't earn an allowance. If you did it would be called pay.

>> No.2645082

She spent 3/4 of her money. So she had 7777*4 before the shopping.

>> No.2645101

>/sci/ can't even do basic math

>> No.2645108

>>2645101
sadly no

>> No.2645111 [DELETED] 

1/2+1/3+1/4>1

Wtf

>> No.2645120

assuming she spent it all at one big splurge at the end of the year, 2592 dollars and 33 cents.

>> No.2645121

>>2645031

>Assuming she only gets money by allowance, how much money does she earn every month?
>how much money does she earn every month?
>does she earn every month?
>she earn

wat

>> No.2645140

>>2645111
exactly my point.

>> No.2645144

$2596.50

Spoiled bitch.

>> No.2645152

>>2645144
wrong.

>> No.2645159

>>idontthinksotim.jpg

>> No.2645161

>>2645152
By like a few bucks, anon just sucks at keeping his decimals.

He should have arrived at
2592.33333...

>> No.2645182

31108

>> No.2645200

135

>> No.2645202

$186,648
0 = ($186,648 / 2) - ($93,324 / 3) - ($31,108 / 4) - $7,777

>> No.2645213

>>2645202
>>2645202
which means, $15,554 a month.

>> No.2645230

>>2645213
>>2645202
Am I right?

>> No.2645232

2592.333 and I am tipsy!

>> No.2645249

>>2645232

This is the right answer!

>> No.2645257

You guys are really fucking dumb. Here' a hint; it's more than $7777 LOL

>> No.2645272

>>2645257

It's not... I had to freaking do the whole math, and get it right... and since the op is a fag and he is not replying - I checked on google and all of them give that same number 2592.333.

OP needs to learn more math and so does other people on this thread who didn't get it right.

>> No.2645277

Seriously, Is $15,554 a month the right answer?
The tension is just eating at me.

>> No.2645281

.5+.33+.25=1.08

>> No.2645283

>>2645272

OP here

Here's a hint, it's less than 2592.333

>> No.2645286
File: 50 KB, 328x480, n119095_1290366889982-NOPE.jpg [View same] [iqdb] [saucenao] [google]
2645286

>>2645277

>> No.2645291

I got $2222. What process did you guys take to get the "right" answer?

>> No.2645293

>>2645281
but, that's not the question. It's asking for 1/3 of the REMAINING money. Ergo:
1/2(x) + (1/6)X + (1/24)x = $7,777
One half of original Money, then 1/3 of the remaining one half, followed by 1/4 of the 1/3 of the original 1/2 of x.
X = $186,648
However, That is just for the Year. Divide by 12 to find the per month basis.
$186,648 / 12 = $15,554

$15,554 per month is her allowance.

>> No.2645295

>>2645283

Fuck this thread... unless OP is a mother fucking genius like Charlie Sheen or Kanye west...

Otherwise:
/thread

>> No.2645299

7777$ monthly allowance.

>> No.2645306

>>2645291

Smartest person on /sci/

>> No.2645309 [DELETED] 

>>2645293
no.
x = yearly allowance = 1 - ((1/2) + (1/(2*3)) + (1/(2*3*4))) = 7777

x/12 = monthly allowance = 2222

>> No.2645312

>>2645306
thanks, and I'm only 17 :P

(USER WAS BANNED FOR THIS POST)

>> No.2645316

>>2645291
Non Sequitur my friend. How did you arrive at that conclusion?

>> No.2645323

>>2645316
7777 / ( 1 - ((1/2) + (1/(2*3)) + (1/(2*3*4))) = yearly allowance. Easy enough from there

>> No.2645332

One day, a person went to horse racing area, Instead of counting the number of human and horses, he instead counted 74 heads and 196 legs. Yet he knew the number of humans and horses there. How did he do it, and how many humans and horses are there?

>> No.2645334

Okay, she spent 1/4 of her money to arrive at $7777.
So x-(1/4)x=7777
3/4x=7777
She had 10,369.3... before buying toys.

y-1/3y=10369.3.... (for games)
2/3y=10369.3...
y=15,554

w-(1/2)w=15554 (for clothes)
1/2w=15554
w=31,108. this is her starting money

now, assuming she collected 12 months of allowance, and isn't collecting interest... 31,108/12=$2,592.3.... /month

>> No.2645367

>>2645332
24 horses, 50 humans.

Also these two are me as well :
>>2645323
>>2645291

>> No.2645378

OP here

The answer is $2222

>> No.2645474

If the answer is $22000 OP, you worded it wrongly. I got $8641.

Here it is:

Every month, a girl gets allowance. Assume last year she had no money, and kept it up to now


>now: March. Assuming she gets the allowance at the beginning of the month she has been paid three times


Then she spends 1/2 of her money on clothes, then 1/3 of the remaining money on games, and then 1/4 of the remaining money on toys

>If A is income, she spends approximately 70% of A. Which means she saves approximately 30% of A.

>7777/3 months = 2592 1/3 : What she saves every month

>If this is what she saves, then all we have to do is times this by 2 1/3(to get from 30 to 70 percent) and add it to 2592 1/3 to get 100% of A

>> No.2645558

>>2645474
>If the answer is $22000 OP
It's not, refer to :
>>2645291
>>2645323
>>2645378

>> No.2645694

>>2645323
>>2645334
which one of these two are the right answer and why? I'm trying very hard to figure it out but can't

>> No.2645714

>>2645058
>>2645063
>>2645121

>> No.2645749

>>2645694
nevermind, the answer isn't 2222. the math was wrong

>> No.2645769
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2645769

>>2645312
then GTFO you need to be 18