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A princess is as old as the prince will be when the princess
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You are currently reading a thread in /r9k/ - ROBOT9001

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A princess is as old as the prince will be when the princess is twice as old as the prince was when the princess's age was half the sum of their present age. Which of the following then, could be true?

1: The prince is 20 and the princess is 30.
2: The prince is 40 and the princess is 30.
3: The prince is 30 and the princess is 40.
4: The prince is 30 and the princess is 20.
5: They both are the same age.

If you can't solve this then you might have below average IQ.
>>
>>26598333
>5: They both are the same age.

duh.
>>
>>26598443
WRONG

orig already
>>
>>26598333
None of those answers are correct and the structure of the riddle is fucking awful and barely makes any sense. Kill yourself OP.
>>
>>26598706
How are you finding this so hard? The wording is the hard part, the rest is just basic algebra or elimination.

I got this question elsewhere and an answer has been confirmed. I will tell you what it is after someone gets it.
>>
>>26598731
>>26598333
It's from Baldur's Gate you faggot, the answer is 4.
>>
>>26598786
WRONG 2.
>>
>>26598786
I mean 3.
>>
>>26598807
Correct orig!
>>
>>26598333
ps and pr are both equations in the form of c+x where x is a variable
ps=princess
pr=prince
lets differentiate the c's of each equation, princess c= cs prince c= cr

ps(0)=pr(z)
ps(z)=2pr(y)
ps(y)=(ps(0)+pr(0))/2

now lets expand

cs=cr+z
cs+z=2(cr+y)
cs+y=(cs+cr)/2

lets do some magic on the bottom equation

cr+z+y=(2cr+z)/2
cr+z+y=cr+.5z
cr+.5z+y=cr
.5z=-y
z=-2y
y=-.5z

okay, now lets put that to use

cs-2y=2cr+2y
cs-4y=2cr
cs=2cr+4y

but wait

cs=cr-2y

so

2cr+4y=cr-2y
cr+4y=-2y
cr=-6y
y=-cr/6

lets go back

cs-cr/6=(cs+cr)/2
cs-cr/6=.5cs+.5cr
.5cs-cr/6=.5cr
.5cs=4cr/6
cs=4cr/3

the only one that fits this is prince aged 30 princess aged 40
fuck that took forever
>>
>>26599119
OHWOAHWOAHWOAH I
WANT A HENTAI
GIRL FOR ME
TO MAKE ME HAPPY
I WANT HER SO I CAN
STOP USING MY HAND
EVERY SINGLE DAY
WHILE WATCHING ANIME
I'D PULL HER FROM MY SCREEN
JUST LIKE IN MY DREAMS
I WANNA FEEL HER TOUCH
MAINLY ON MY CROTCH
I WANT MY OWN HENTAI GIRRRRRRLLLL!
>>
File: 1454030401402.jpg (326 KB, 1280x720) Image search: [Google]
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hey OP could you pose the riddle in a way that makes fucking sense and is not a run on sentence?
>>
>>26599187
you just jelly that you couldn't have ever hoped to solve this problem without Googleing it first
>>
>>26598333
Y = years until princess is twice as old as the prince was when the princess's age was half the sum of their present ages

A = age that the prince was when the princess's age was 1/2 the sum of their present ages

F = M + Y
Y = 2(A) - F
A = M - (F - .5(M+F))

F = M + 2(M - (F - .5(M+F))) - F
F = M + 2M - 2(F - .5(M+F)) - F
F = M + 2M - 2F + (M+F) - F
F = M + 2M - 2F +M + F - F
3F = 4M
F = 4/3 * M

--------------------------------------------------

The correct answer is 3. Could've done it by substitution, but that's the lazy way.
>>
>>26599241

>>26599984 and >>26599119 managed to solve the riddle in that form? Why can't you?
Thread replies: 15
Thread images: 2

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