NeoPets Riddles (Lenny Conundrums) and Answers Here

I'm waiting also!

LC round 256
I got a slightly different answer than the 2 answers I've seen here.
My solution is very similar to stapel's, so I wonder if I made a math error.

I'm using the following symbols:
x - position
v - velocity
a - acceleration
a' - integral of acceleration

Here are the general equations I'm using:
a(t) = a0 +a0't = 2t
v(t) = v0 + a0t + a0't^2/2 = t^2
x(t) = x0 + v0t + a0t/2 + a0't/3 = 2t^3/3

The main difference comes from my position equation.
Note that I'm factoring in the integral of acceleration into all 3 equations.

So I get
x(15) =2250
not
x(15) =1125

This leads me to a final answer of 39375, not 38250.

I'm not clear on how the apostrophe notation is working...?

For the interval 0 < t < 15, we have:

. . . . .a(t) = 2t, with a(0) = 0

. . . . .v(t) = int [ a(t) ] dt = t^2 + c, with v(0) = 0
. . . . .v(0) = 0^2 + c = 0, so c = 0
. . . . .v(t) = t^2

. . . . .x(t) = int [ v(t) ] dt = (1/3) t^3 + d, with x(0) = 0
. . . . .x(0) = (1/3) 0^3 + d = 0, so d = 0
. . . . .x(t) = (1/3) t^3

I don't know how you got x(t) to be (2/3) t^3. Where did the "2" come from?

Note: Just as (2/3) is twice (1/3), so also 2250 is twice 1125. Your doubling came from that "2".

Eliz.

Re: LC round 256


Your problem seems to be in your integration from v(t) to x(t). I believe it should be:

x(t) = x0 + v0t + a0t^2/2 + a0't^3/6 = t^3/3

after setting x0 = v0 = a0 = 0 and a0' = 2. As stapel mentioned, you have a 2 in front of the t^3/3, probably because you missed carrying the 2 in the denominator through when you integrated from v(t) to x(t).

Congratulations! You have guessed correctly in the Lenny Conundrum game (round 256). You have won 2294 NP!

Yours Sincerely,
The Neopets Team!

I put 38250... so I guess that's the right answer ^_^

And 2294... that's the most I've ever gotten from the LC before

Got the same, but not quick enough for a trophy

i got it wrong but my brother got it right

Ah, you're right!
I integrated the velocity equation incorrectly.

The derivative of a0't^3/3 = a0't^2.
But my own equation for v(t) had the a' term as a0't^2/2.
So you're absolutely correct... I had omitted a factor of 1/2.

That explains the error.

Thanks everyone.

I have to think I didn't get it right either. I honestly can't remember what I arrived at after some help from a friend - I guess I should have written it down *LoL* - so I don't know what I guessed. But I haven't recieved an e-mail, so I got it wrong. That's okay, I was way too late to get the trophy any way =)

But I can stay up tonight and wait for the new one - my sleep doctor gave me two choices on how to correct my day-to-night-rhythm, one very weird one and the one I'm going to try. So I'm not going to bed until 4:30 AM. So no chance in HELL I'm getting up for school tomorrow *LoL*

And if they complain, I can just tell them what the doctor said

Congratulations! You have guessed correctly in the Lenny Conundrum game (round 256). You have won 2294 NP! Because you were in the first 250 to guess correctly, you also have been awarded a Dr. Sloth Hair Pomade, and receive a trophy and the Lenny Conundrum avatar! Yours Sincerely, The Neopets Team!


See?

It was 32850

New LC is out.

Well, the process is straightforward enough. Reorder the tiles to make two lines of words giving a question, then answer the question.

Four spaces on the top row and five on the bottom. ? is obviously the last non-blank entry on the bottom row. Maximum of 5 words on the top line and 6 words on the bottom line.

First guess for part of the top line would be WHAT PETPET...

Yikes..... I haven't a clue. I get lost in the A's.

How did u guess that?

Or if we keep it to PET instead of PETPET, we can make PAINT in the first line.

time for printer and scissors

It is a question, so it is likely to start with WHAT, WHERE, WHICH, WHO, etc. WHO would be another possibility, but we don't have the letters for WHERE or WHICH.

PETPET just jumped out at me. It would be common for them to ask us to identify something about a PET or PETPET.

To clarify

is this going to be 4 lines of text or 2? or how many? obviously it has to be even

or is that a variable

Yeah but you can't just guess the whole question. There's a system to moving the rectangulars around to form words.

It's too hard to figure out with it on the screen, and I don't have a printer =S so I have to wait until someones tells us what the system it before I can do it.