|
|
Math logic puzzler for fun
07-21-2017, 06:50 AM
|
#1
|
Give me a museum and I'll fill it. (Picasso) Give me a forum ...
Join Date: Jun 2007
Posts: 13,202
|
Math logic puzzler for fun
Solve this:
1 + 4 = 5
2 + 5 = 12
3 + 6 = 21
5 + 8 = ?
What is the last answer?
I'll post the answer sometime this evening (eastern time), to give people a chance to answer.
|
|
|
|
Join the #1 Early Retirement and Financial Independence Forum Today - It's Totally Free!
Are you planning to be financially independent as early as possible so you can live life on your own terms? Discuss successful investing strategies, asset allocation models, tax strategies and other related topics in our online forum community. Our members range from young folks just starting their journey to financial independence, military retirees and even multimillionaires. No matter where you fit in you'll find that Early-Retirement.org is a great community to join. Best of all it's totally FREE!
You are currently viewing our boards as a guest so you have limited access to our community. Please take the time to register and you will gain a lot of great new features including; the ability to participate in discussions, network with our members, see fewer ads, upload photographs, create a retirement blog, send private messages and so much, much more!
|
07-21-2017, 06:54 AM
|
#2
|
Recycles dryer sheets
Join Date: Feb 2010
Posts: 416
|
45
|
|
|
07-21-2017, 06:55 AM
|
#3
|
Recycles dryer sheets
Join Date: Nov 2010
Location: Earth
Posts: 334
|
34
|
|
|
07-21-2017, 07:05 AM
|
#4
|
Thinks s/he gets paid by the post
Join Date: Jul 2007
Posts: 3,222
|
Looks like a trick question, I'll go with 13.
|
|
|
07-21-2017, 07:07 AM
|
#5
|
Recycles dryer sheets
Join Date: Sep 2005
Posts: 61
|
45
__________________
"The surest sign that there is intelligent life out there is that they haven't tried to contact us yet." Calvin & Hobbes
|
|
|
07-21-2017, 07:10 AM
|
#6
|
Recycles dryer sheets
Join Date: Jan 2017
Posts: 74
|
45
|
|
|
07-21-2017, 07:11 AM
|
#7
|
Recycles dryer sheets
Join Date: Aug 2013
Posts: 275
|
34
|
|
|
07-21-2017, 07:11 AM
|
#8
|
Full time employment: Posting here.
Join Date: May 2013
Posts: 756
|
45
__________________
“Believe me, my young friend, there is nothing - absolutely nothing - half so much worth doing as simply messing about in boats.” ― Kenneth Grahame, The Wind in the Willows
|
|
|
07-21-2017, 07:15 AM
|
#9
|
Thinks s/he gets paid by the post
Join Date: Oct 2014
Posts: 1,677
|
34
I should move this to the "pet peeves" post. Puzzles like this are nice little brain teasers, but the syntax is totally nonsensical and are like nails on a chalkboard to me. The + and = symbols have very specific meaning. One should not just throw around terms such as " 2+5=12".
It is bad math grammar.
|
|
|
07-21-2017, 07:16 AM
|
#10
|
Thinks s/he gets paid by the post
Join Date: Oct 2008
Posts: 2,782
|
Probably more than one answer. The one that stands out to me is 34.
|
|
|
07-21-2017, 07:17 AM
|
#11
|
Give me a museum and I'll fill it. (Picasso) Give me a forum ...
Join Date: Nov 2009
Posts: 6,682
|
I like 45, too.
__________________
Retired in late 2008 at age 45. Cashed in company stock, bought a lot of shares in a big bond fund and am living nicely off its dividends. IRA, SS, and a pension await me at age 60 and later. No kids, no debts.
"I want my money working for me instead of me working for my money!"
|
|
|
07-21-2017, 07:21 AM
|
#12
|
Recycles dryer sheets
Join Date: Jan 2017
Location: Charlotte
Posts: 222
|
45
“a + b” then answer is “a + (a x b)” in each case.
|
|
|
07-21-2017, 07:24 AM
|
#13
|
Thinks s/he gets paid by the post
Join Date: Sep 2009
Location: Hong Kong
Posts: 1,688
|
Any of 13, 34 and 45 can be supported with logic which I suppose is the whole point of the exercise.
__________________
Budgeting is a skill practised by people who are bad at politics.
|
|
|
07-21-2017, 07:28 AM
|
#14
|
Recycles dryer sheets
Join Date: Aug 2013
Posts: 275
|
Quote:
Originally Posted by traineeinvestor
Any of 13, 34 and 45 can be supported with logic which I suppose is the whole point of the exercise.
|
Yep, I'm waiting to see what answer tells you about "you"
|
|
|
07-21-2017, 07:33 AM
|
#15
|
Full time employment: Posting here.
Join Date: May 2013
Posts: 756
|
__________________
“Believe me, my young friend, there is nothing - absolutely nothing - half so much worth doing as simply messing about in boats.” ― Kenneth Grahame, The Wind in the Willows
|
|
|
07-21-2017, 07:34 AM
|
#16
|
Full time employment: Posting here.
Join Date: Jan 2011
Location: Southern Maine
Posts: 672
|
on first look I can see at least 3 answers that could work.... 34, 37 or 45, but I could probably find more that would work also.
The problem with questions like this is it is a more sophisticated version of if a+b=17, what is the value of A?
|
|
|
07-21-2017, 07:35 AM
|
#17
|
Full time employment: Posting here.
Join Date: Jan 2011
Location: Southern Maine
Posts: 672
|
Quote:
Originally Posted by Philliefan33
34
I should move this to the "pet peeves" post. Puzzles like this are nice little brain teasers, but the syntax is totally nonsensical and are like nails on a chalkboard to me. The + and = symbols have very specific meaning. One should not just throw around terms such as " 2+5=12".
It is bad math grammar.
|
+1
|
|
|
07-21-2017, 07:35 AM
|
#18
|
Full time employment: Posting here.
Join Date: Feb 2017
Location: Severn
Posts: 947
|
34
|
|
|
07-21-2017, 07:48 AM
|
#19
|
Thinks s/he gets paid by the post
Join Date: Jul 2007
Posts: 3,222
|
Quote:
Originally Posted by Philliefan33
34
It is bad math grammar.
|
Agree, math sequence puzzles usually have commas between the numbers, that's why I picked 13.
|
|
|
07-21-2017, 07:52 AM
|
#20
|
Thinks s/he gets paid by the post
Join Date: Oct 2008
Posts: 2,782
|
Reminds me of those aptitude tests that you had to take in high school. You saw many different possible answers to one question, and you wondered if the folks who wrote the questions even realized that !!
|
|
|
|
|
Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
|
|
Thread Tools |
|
Display Modes |
Linear Mode
|
Posting Rules
|
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts
HTML code is Off
|
|
|
|
» Recent Threads
|
|
|
|
|
|
|
|
|
|
|
|
|
» Quick Links
|
|
|