NeoPets Riddles (Lenny Conundrums) and Answers Here

w00t!
Congratulations! You have guessed correctly in the Lenny Conundrum game (Round 119). We have given you a Fyoras Hair Care, an Avatar, and 608 NP!

w00t w00t!

Congratulations! You have guessed correctly in the Lenny Conundrum game (Round 119). We have given you a Fyoras Hair Care, an Avatar, and 608 NP!

272059500 didnt expect to win this one and what a bonus i got the Avatar as well I'm sooo happy

i don't understand. 272059500 is the answer that i sent but i haven't received anything yet.

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THIS WEEKS PUZZLE - ends next Thursday most probably

A Maraquan Acara entered the Food Shop, wanting to buy a chocolate-covered carrot. "That'll be 2400 Neopoints!" the shopkeeper declared. Unfortunately, the Acara didn't have that much, but she decided to make a deal. She offered to buy the chocolate-covered carrot but only if the shopkeeper loaned her as many Neopoints as the Acara currently had. The shopkeeper agreed, and the Acara bought the carrot and left.

Then the Acara went straight to the Book Shop, and found a book she wanted for 2400 Neopoints. She still didn't have that much, so she made the same offer to the shopkeeper. The shopkeeper agreed to loan her the same amount of Neopoints as she currently had, and she bought the book.

She tried the same thing at both the Magic Shop and the Back-To-School Shop, where she bought a 2400-Neopoint item at each shop. After completing her purchase at the Back-To-School shop, she had no Neopoints left.

How many Neopoints did the Acara start with?

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Either I'm missing something, or this week's puzzle is week's puzzle is too straight forward.

Ok, math obviously isn't my strong suit.

I submitted the same answer, but never received any winnings...

Anyway, this weeks seems to be extremely easy. My math puts the answer at 2250 Neopoints.

2250*2=4500
4500-2400=2100
2100*2=4200
4200-2400=1800
1800*2=3600
3600-2400=1200
1200*2=2400
2400-2400=0

I rawk at Math and I already figured it out. You work backwards. Here you go, correct me if I'm wrong:

Acara has 0 NP after spending 2400 NP.
Acara has 2400 NP after being loaned what she currently had.
Acara has 1200 NP after spending 2400 NP.
Acara has 3600 NP after being loaned what she currently had.
Acara has 1800 NP after spending 2400 NP.
Acara has 4200 NP after being loaned what she currently had.
Acara has 2100 NP after spending 2400 NP.
Acara has 4500 NP after being loaned what she currently had.
Acara has 2250 NP.

So, the Acara had 2250 NP to start with.

In mathematical terms:

0
+2400
2400
/2
1200
+2400
3600
/2
1800
+2400
4200
/2
2100
+2400
4500
/2
2250

I put in 2250, so if that's wrong, I got it wrong. >.<

Yup, working backwards is how I solved it too. Seems to be the easiest way. I first tried setting up an equation, but the answer didn't make any sense. I could figure out what was wrong with the equation, so I just went brute force on the problem.

Yep. That's what I said. Either too easy, or there's something we should know either about Maraquan Acara or one of the shops or whatever...

On the other hand last two weeks were tricky, so maybe TNT is simply giving away a simple problem so that those who don't get the other ones don't feel too stupid...

I got the same answer btw. 2250.

thats what I got too

hi
Hello, I joined because I found this forum while searching for hints for past Lenny Conundrums, as I am trying to retroactively solve the ones that don't have a solution key provided. Unfortunately, the older ones don't have much in the way of discussion going.

Is there something I'm missing about Round 64 that wouldn't make it much easier than the brute force method? I can't think of how to do it besides to make every possible solution and count the primes. [No, I can't program to save my life... I can't even think of what program I could use to work this out.]

This is the problem, for those not on Neopets:



I've worked through maybe a tenth of the total possible combinations so far* and found twelve primes, but I'm not looking forward to finishing the rest [though it would be gratifying if I found ones they missed!].

*assuming I must use all the symbols for every combination, and assuming all functions are performed immediately from left to right, so brackets are irrelevant

So... what am I doing wrong, besides doing it the hard way?

Thanks

According to the examples given, your assumption that all symbols must be used is wrong.

The second example implies that you can use multiple instances of each symbol (11).

Also, you may miss solutions by not using brackets.

Dont talk about old ones !! it is annoyin

How so? The poster clearly stated that this was an older Lenny, so there should have been no confusion. The poster is making the laudatory effort to learn how the Lennys work, which is pretty cool, I think.

Kudos, "Jen Aside"! :wink:

Eliz.

Wouldn't you theoretically be able to just find the greatest number you can make possible with 1, 3, 5, 7, and 9. Then count the number of primes in all of those number. Then from those figure out wich answers can be created using only the numbers 1, 3, 5, 7, and 9. All you need to do is make an equation with the numbers to fit the answer and if it doesn't work then that prime would not be a part of the answer to the conundrum. This would be easier than trying to think of all the different equations for numbers you don't even know.

I think the examples make the problem ambiguous.

Mystery Pic
Yes i have done all the calculations and the answer is 2250... But whats the mystery pic answer?

The examples do seem to be misleading, which isn't entirely surprising since it's been suggested that the Neopets Team has made mistakes in prior LCs before. That does raise a point I may have overlooked--not to find how many combinations make primes, but how many primes can be made using the symbols. [That does cut my work by a lot!]

When I tried to figure out how to count bracketing, it seemed to be pointless, because (1+3)*5 is the same as 5*(1+3), so as long as I maintained that functions were always carried out from left to right immediately, regardless of normal priority. That does seem to change things, though, if I have (1+3)*(7-5)... hmm.



Annoying how?

I joined because I wanted help after I couldn't find any hints elsewhere. I'm just trying to understand why I can't get the correct answer, especially since Neopets doesn't seem willing to provide it no matter how much I ask.

Congratulations! You have guessed correctly in the Lenny Conundrum game (Round 120). We have given you a Maraquan Acara Pen, an Avatar, and 134 NP!
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So the answer was unsurprisingly 2250. And unsurprisingly almost 15,000 ppl got it right.... Must be a tough one in the store for next week (or another pure guessing one)....