Brain teaser....

[The Shadow]

k to first correct answer.


Complete the next 2 numbers in the sequence:

2, 12, 360, 75,600 ........

 

[hamstershaver]

174636000

 

[stfuhr]

24,000, 3,750

 

[stilleto]

edit... you said two numbers and I don't have a calculator

 

[stilleto]

174636000, 5244319080000

that was hard to figure out.

 

[Lestat]

174636000, 5244319080000

 

[Lestat]

shti i was barely too slow!! fugg

 

[stilleto]

shti i was barely too slow!! fugg

you looooooooooooooooooooooooooooose

 

[stfuhr]

Oops. I'm an idiot. I read 75,600 as 75 and 600.

 

[hamstershaver]

who the hell edited my post and took the 2nd number off?

 

[stilleto]

who the hell edited my post and took the 2nd number off?

let me go look.

oh, nobody. it hasn't been edited.
but thats a really good try.

 

[stilleto]

btw hammy, did you study primorials by analogy with superfactorials or did you just look this up?

 

[hamstershaver]

i am the rainman of numbers

 

[samoth]

i am the rainman of numbers

 

[alien amp pharm]

Google has ruined everything trivial

 

[Buddy_Christ]

i am the rainman of numbers

I've heard you act just like Rainman in bed too...not a clue what you're supposed to be doing.

 

[blut wump]

Late to the party but I dispute the answer anyway. I know you can Google for the answers above.

2, 12, 360, 75600

142884000, 2970558360000


Take the original number and multiply it by 3 to give 6 for use as a multiplier.

Multiply the previous multiplier by the last bump number + 2.

6 * 5 -> 30
30 * 7 -> 210
210 * 9 -> 1890
1890 * 11 -> 20790

75600 * 1890 = 142884000
142884000 * 20790 = 2970558360000

 

[stilleto]

Late to the party but I dispute the answer anyway. I know you can Google for the answers above.

2, 12, 360, 75600

142884000, 2970558360000


Take the original number and multiply it by 3 to give 6 for use as a multiplier.

Multiply the previous multiplier by the last bump number + 2.

6 * 5 -> 30
30 * 7 -> 210
210 * 9 -> 1890
1890 * 11 -> 20790

75600 * 1890 = 142884000
142884000 * 20790 = 2970558360000

i know you won't believe me but I did it this way first. I really do think either answer is correct, which is common for these type of problems.

 

[blut wump]

I believe you. The original problem should have specified an extra term. The underlying numbers often provoke unexpected sequences, especially when powers are invlolved and we have two mods here.

 

[stilleto]

I believe you. The original problem should have specified an extra term. The underlying numbers often provoke unexpected sequences, especially when powers are invlolved and we have two mods here.

The only reason why I didn't post the answer your way was because my calculator only shows 4 or 5 digits (some cheap ass thing), so i had to do it by hand and I refigured the problem.

 

[blut wump]

The only reason why I didn't post the answer your way was because my calculator only shows 4 or 5 digits (some cheap ass thing), so i had to do it by hand and I refigured the problem.

I'm appalled that you weren't doing it in your head.

 

[stilleto]

I'm appalled that you weren't doing it in your head.

my final answer was done with paper and a pencil.

 

[hamstershaver]

my final answer was done with paper and a pencil.

you are <cough> very <bullshit> smart for doing that in your <google> head

 

[gotmilk]

huh

 

[stilleto]

you are <cough> very <bullshit> smart for doing that in your <google> head

do you need a cough drop?
or some tylenol? you seem to have a cough and your fever is making you delerious.

 

[BrothaBill]

do you need a cough drop?
or some tylenol? you seem to have a cough and your fever is making you delerious.

you have admitted to googling answers to k threads before yknow lol
I can picture you all studious with pen and paper, biting on your tongue out the side of your mouth with an old fashioned accounting machine with the crank, checking the printout, doublechecking with an abacus, but I think you are more of a point A to point B person with google lol

 

[feisty11975]

k to first correct answer.


Complete the next 2 numbers in the sequence:

2, 12, 360, 75,600 ........

scratch that

I have no friggin clue

 

[blut wump]

It's the way of a constipated mathematician to work things out with a pencil. I prefer a log table.

 

[stilleto]

you have admitted to googling answers to k threads before yknow lol
I can picture you all studious with pen and paper, biting on your tongue out the side of your mouth with an old fashioned accounting machine with the crank, checking the printout, doublechecking with an abacus, but I think you are more of a point A to point B person with google lol

of course I have googled answers- it didn't dawn on me to google a math problem though. it wasn't difficult to figure out- just time consuming to get the answer- it was all division and multiplication.
I have a page of scribbled numbers to prove it.

 

[blut wump]

I just took another look at my solution against the powers one. They are, of course, the same solution except that the powers one is more clearly based on primes rather than simple odd numbers. By basing mine on odd numbers I was led to a factor of 9 after 7 rather than a leap to 11. If I press on to mutiplying by 11 then 13 rather than by 9 and then 11 I get the same answers as everyone else, which is to be expected.

I think they are each valid solutions since the author didn't allow sufficient of the sequence to show to demand that primes be used, although you could argue the converse by indicating that the sequence begins with a 2.

There's no need to Google for this for anyone accustomed to ferreting out sequences.

 

[stilleto]

I just took another look at my solution against the powers one. They are, of course, the same solution except that the powers one is more clearly based on primes rather than simple odd numbers. By basing mine on odd numbers I was led to a factor of 9 after 7 rather than a leap to 11. If I press on to mutiplying by 11 then 13 rather than by 9 and then 11 I get the same answers as everyone else, which is to be expected.

I think they are each valid solutions since the author didn't allow sufficient of the sequence to show to demand that primes be used, although you could argue the converse by indicating that the sequence begins with a 2.

There's no need to Google for this for anyone accustomed to ferreting out sequences.

I did 7,9,11 first when I used a calculator (if anyone had been watching, my first reply to this thread was posting your answers, except i could only go around 4 numbers past the decimal and that wasn't working well so i edited it), but when I did it by hand I thought that logically, adding 2 to the sequence seemed less likely than just using primes- based on the first number of the series.
but, that was pretty much a logical guess, either answer is right.

even though i posted mine first.

 

[blut wump]

I have to think that only my answer is the correct one by virtue of encompassing both answers and a family of others with different start values.

 

[stilleto]

I have to think that only my answer is the correct one.

I have to think that although both answers could be considered correct, the fact remains that I POSTED IT FIRST.

 

[blut wump]

While I must congratulate your celerity, I think mine encompasses all plausible answers.

Oh, I just noticed that he's already paid out. Congrats.

 

[hamstershaver]

my answer was first and this whole thing was fixed

 

[stilleto]

While I must congratulate your celerity, I think mine encompasses all plausible answers.

Oh, I just noticed that he's already paid out. Congrats.

I shared a bit of the wealth with you.
although, your answer only encompasses half of the plausible answers, and your methodology only covered half of the process.

i do, however, think we can both agree to the fact that hamstershaver wasn't even friggin' close.

 

[blut wump]

Your generosity is bounded only by the dictates of the system. You are a scholar and a gentleman, sir.

 

[stilleto]

 

[The Shadow]

I just took another look at my solution against the powers one. They are, of course, the same solution except that the powers one is more clearly based on primes rather than simple odd numbers. By basing mine on odd numbers I was led to a factor of 9 after 7 rather than a leap to 11. If I press on to mutiplying by 11 then 13 rather than by 9 and then 11 I get the same answers as everyone else, which is to be expected.

I think they are each valid solutions since the author didn't allow sufficient of the sequence to show to demand that primes be used, although you could argue the converse by indicating that the sequence begins with a 2.

There's no need to Google for this for anyone accustomed to ferreting out sequences.

K to you as well as you are correct

 

[hamstershaver]

am i on ignore?

 

[The Shadow]

How so Hammy??


You didnt list BOTH numbers on EITHER solution

 

[hamstershaver]

How so Hammy??


You didnt list BOTH numbers on EITHER solution

partial credit

 

[stilleto]

K to you as well as you are correct

damn, and i went and shared some of my winnings with him already.

thank you shadow.
ignore hammy. he's just a bitter old man.

 

[hamstershaver]

 

[blut wump]

Thanks, Shadow, most generous.

I have to think that Hammy was deprived on a technicality.

 

[The Shadow]

Thanks, Shadow, most generous.

I have to think that Hammy was deprived on a technicality.

I don't see this....tell me how.

He only gave ONE of the numbers.

Had he given BOTH as was specified, he would have been the winner for one of the correct answers.

 

[The Shadow]

bump



There is one other possible solution I just noticed.