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NeoPets Riddles (Lenny Conundrums) and Answers Here

 
 
markr
 
  1  
Reply Sat 14 May, 2005 08:04 am
Izzy wrote:
so what numbers do you type in, in the answer box?

Is it 43 or
499849?

Sorry im getting all confused

That you should have to figure out yourself!
0 Replies
 
stapel
 
  1  
Reply Sat 14 May, 2005 08:33 am
Izzy wrote:
so what numbers do you type in, in the answer box?

Read the question. What does it ask for, the sum of the digits or the actual number?

Eliz.
0 Replies
 
likelenny
 
  1  
Reply Sun 15 May, 2005 11:22 am
so many people cock up on the obviouse thing dont they
0 Replies
 
likelenny
 
  1  
Reply Sun 15 May, 2005 11:23 am
but actually there isnt a question !!!
0 Replies
 
stapel
 
  1  
Reply Sun 15 May, 2005 03:24 pm
likelenny wrote:
but actually there isnt a question !!!

"I'm thinking of a 6-digit number..." with certain properties....

******************************
******** 707^2 = 499849 ********
******************************
**** 4 + 9 + 9 + 8 + 4 + 9 = 43 ****
******************************
***** HERE IS THE ANSWER: ******
******************************
*********** 499849 ************
******************************


Eliz.
0 Replies
 
ninneko
 
  1  
Reply Wed 18 May, 2005 04:36 pm
^^ yea... read the context of the problem before you come and ask questions, okay? fact is, using knowledge right in front of you and common sense together, you can figure out many things.... Other stuff is just to help out that "common sense..."
0 Replies
 
Sari
 
  1  
Reply Thu 19 May, 2005 11:55 am
Thusday, May 19th and there's a new conundrum:

First, take the number of shops in Brightvale. Multiply that by the number of different cards in the Curse of Maraqua TCG set. Then multiply by the number of different "food" colours you can paint a Chia. Finally, multiply the whole thing by the number of prime numbers between one and a million that become a perfect square if you add 1 to them.

What is the answer?


Razz I'm trying to find out how many cards are in the curse of maraqua tcg set at the moment...
0 Replies
 
jobie brathwait
 
  1  
Reply Thu 19 May, 2005 12:07 pm
Evil or Very Mad
*bangs head against wall*
I HATE math! I hate hate hate hate it!!!
Crying or Very sad
Ah, well....no avatar for me this week.....maybe next time..
0 Replies
 
Sari
 
  1  
Reply Thu 19 May, 2005 12:23 pm
*shrugs* my hardest thing is finding out for sure about those TCGs.... the prime/ perfect square numbers aren't so bad... they'll just take me a while Razz I wonder if there's a faster way to do this... *turns on her graphing calculator with a gleam*
0 Replies
 
Bleeding Inside Out
 
  1  
Reply Thu 19 May, 2005 12:41 pm
...
hmm... I think I have a list of all the CoM TCG cards... I'll look for it later...
0 Replies
 
Sari
 
  1  
Reply Thu 19 May, 2005 12:55 pm
You do? Very Happy that's great... all the info I can find on neo just shows like, 4 booster packs, and says they contain 8 cards each... so at the moment I'm assuming 32... but I know diddly about how the TCGs work Razz
0 Replies
 
tryin
 
  1  
Reply Thu 19 May, 2005 01:14 pm
120 Curse of Maraqua cards
0 Replies
 
Isfan
 
  1  
Reply Thu 19 May, 2005 02:09 pm
The number of shops in Brightvale is 7. You can find this just by going to the map and counting them.

Brightvale: 7

The TCG collection has 120 cards in it. If you don't believe me go here: http://www.neopets.com/tcg/checklist.phtml?edition=7

TCG: 120

The number of Chia food paints is 20. Count them yourself here: http://www.neopets.com/rainbowpool_allpetcolours.phtml?get_pet=Chia
(Dont forget that Orange is a food color.)

Chia: 20

Here's the tricky part. all the prime numbers from one to a million that when you add 1 to them become a perfect square.

To do this step I had to work backwards.
First I took numbers, squared them, and then subtracted one to see if they were prime. Here's what I quickly learned:
1. Any odd number (a number that ends in 1, 3, 5, 7, or 9) when squared yeilds an odd number, and when you subtract 1 from an odd number it becomes even, and even numbers are not prime.
2. Any number ending in 4 or 6 would not work, because when you square then your units digit will always be 6, subtract one and you get 5, and anything ending in 5 (excluding 5) is not a prime number.
3. Any number ending in 2 or 8 when squared and had 1 subtracting from it is always divisible by 3. Don't ask me why, but just try it yourself. Pick any big number ending in 2 or 8 (like 55552), square it, subtract one, and divide by 3. You'll see that it always works.

With this, I knew that all numbers ending in 1, 2, 3, 4, 5, 6, 7, 8, or 9 did not work.

This just left me with the number 0.
This part is a little tricky:
4. When a number is divisible by 10, if you square it and subtract 1, the product you get from this is always divisible by the your initial number plus and minus 1. (I.E. 10 squared yeilds 100, minus one yeild 99. 99 = 9 * 11, therefore it is not a prime number.) As you can see, 10 yielded 99, which is the same thing you would get if you took (10 - 1)*(10 + 1). Try it with any number, really.

With these fact we can determine no two digit number can be squared then have one subtracted from it to yield a prime number, though there may be exceptions to these rules if we go down into the single digit numbers. So we check.

1) 1 is technically not a prime number, but it still doesn't work. 2 is not a perfect square.
2) Two is the only even prime number, but unfortunately 3 is not a perfect square.
3) three plus one yields four, which we all know is 2 squared.

So there is at least 1 prime number between 1 and a million that fits the description we need. This means our answer wont be zero. Let's quickly check the rest of the primes below 10.

5) 6 isn't a perfect square.
7) 8 isn't a perfect square.

That's all the single digit prime numbers. So between 1 and a million, only the number 3 when adding 1 to it makes a perfect square.

Primes: 1


We tally up the totals:

Shops: 7
TCG: 120
Chia: 20
Primes: 1

7 * 120 * 20 * 1 = 16800.

And that's your answer. Smile
0 Replies
 
FFroggy
 
  1  
Reply Thu 19 May, 2005 02:26 pm
I count 21 for the # of different "food" colours you can paint a Chia

1)Apple
2)Asparagus
3)Aubergine
4)Avocado
5)Blueberry
6)Carrot
7)Chocolate
8)Chokato
9)Durian
10)Gooseberry
11)Grape
12)Lemon
13)Lime
14)Orange
15)Pea
16)Peach
17)Pear
18)Pineapple
19)Plum
20)Thornberry
21)Tomato

Didn't know durian was a food but looked at the pic and it looks like a fruit to me
0 Replies
 
FFroggy
 
  1  
Reply Thu 19 May, 2005 03:57 pm
Answer
OK here are the prime #s that I found...

143; 323; 899; 1763; 3599; 5183; 10403; 11663; 19043; 22499; 28223; 32399; 36863; 39203; 44099; 49283; 51983; 57599; 63503; 72899; 79523; 97343; 101123; 121103; 129599; 142883; 152099; 161603; 166463; 176399; 186623; 191843; 202499; 213443; 230399; 242063; 272483; 278783; 311363; 324899; 345743; 359999; 374543; 381923; 396899; 412163; 419903; 435599; 451583; 476099; 535823; 544643; 589823; 608399; 636803; 656099; 675683; 685583; 705599; 725903; 736163; 756899; 777923; 809999; 831743; 887363; 898703; 956483; 980099

That makes a total of 69.

In the previous post I put in that there are a total of 21 different "food" colours you can paint a Chia.

There are 120 Curse of Maraqua cards in the TCG set.

AND

There are 7 shops in brightvale.

So the answer would be...

7 * 120 = 840 * 21 = 17,640 * 69 = 1,217,160

Answer is 1217160
0 Replies
 
stapel
 
  1  
Reply Thu 19 May, 2005 04:19 pm
Where on earth are you getting your "primes" from? Your very first one, 143, is the product of 11 and 13.

I ran a list of primes (from one of many online sources) against a list of squares-less-one, and the only prime I found that fit the criteria was the same one found earlier: 3.

Eliz.
0 Replies
 
markr
 
  1  
Reply Thu 19 May, 2005 04:32 pm
Isfan:
"3. Any number ending in 2 or 8 when squared and had 1 subtracting from it is always divisible by 3. Don't ask me why, but just try it yourself. Pick any big number ending in 2 or 8 (like 55552), square it, subtract one, and divide by 3. You'll see that it always works."

This is wrong. Try it with 12, 18, 42, 48, 72, 78.

Given a number, 10x+2 (which is all numbers ending in 2), one less than the square of the number will not be divisible by three if x is one more than a multiple of three. The same is true for 10x+8. What it boils down to is if the original number is a multiple of three, then the square is also. Therefore, one less than the square can't be a multiple of three.

FFroggy:
"143; 323; 899; 1763; 3599; 5183; 10403; 11663; 19043; 22499; 28223; 32399; 36863; 39203; 44099; 49283; 51983; 57599; 63503; 72899; 79523; 97343; 101123; 121103; 129599; 142883; 152099; 161603; 166463; 176399; 186623; 191843; 202499; 213443; 230399; 242063; 272483; 278783; 311363; 324899; 345743; 359999; 374543; 381923; 396899; 412163; 419903; 435599; 451583; 476099; 535823; 544643; 589823; 608399; 636803; 656099; 675683; 685583; 705599; 725903; 736163; 756899; 777923; 809999; 831743; 887363; 898703; 956483; 980099"

This is wrong. As pointed out by Isfan, 600^2 - 1 = 599 * 601 = 359999
0 Replies
 
FFroggy
 
  1  
Reply Thu 19 May, 2005 04:36 pm
OK i never said I was totally right... We all make mistakes ... sorry...

No need to insult
0 Replies
 
stapel
 
  1  
Reply Thu 19 May, 2005 04:38 pm
Isfan wrote:
1. Any odd number (a number that ends in 1, 3, 5, 7, or 9) when squared yeilds an odd number, and when you subtract 1 from an odd number it becomes even, and even numbers are not prime.
True.

Isfan wrote:
2. Any number ending in 4 or 6 would not work, because when you square then your units digit will always be 6, subtract one and you get 5, and anything ending in 5 (excluding 5) is not a prime number.
True.

Isfan wrote:
3. Any number ending in 2 or 8 when squared and had 1 subtracting from it is always divisible by 3.
n^2 + 1, but not many of the form n^2 - 1, like we're looking for. The only one I could find was 3.

Eliz.
0 Replies
 
stapel
 
  1  
Reply Thu 19 May, 2005 04:44 pm
FFroggy wrote:
OK i never said I was totally right.

Either numbers are prime, or they're not. You didn't say you thought the numbers you listed might maybe be prime; you said they were. For the benefit of others relying on the information within this thread, this error was corrected.

FFroggy wrote:
No need to insult

I'm sorry if you don't tolerate correction well, but nobody insulted you when they posted corrected infrormation. Please be considerate of the needs (for accuracy) of others. Thank you.

Eliz.
0 Replies
 
 

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