CrazyEngineers Archive
Old, but evergreen and popular discussions on CrazyEngineers, presented to you in read-only mode.
@Kaustubh Katdare • 03 Dec, 2013 • 1 like
Found this puzzle on LinkedIn and I think it's a good mental exercise. Not at all difficult to crack, but should give you a good 30 seconds 😀
- 9 = 90
- 8 = 72
- 7 = 56
- 6 = 42
- 3 = ??
@Igneta D'Souza • 03 Dec, 2013
12😉
@Ankita Katdare • 03 Dec, 2013
18 it should be. Or is this a problem that has multiple correct answers based on assumptions or not-enough-data.
@Manashree Thokal • 03 Dec, 2013
12
@Anoop Kumar • 03 Dec, 2013
12 😀
x = x*(x+1)
x = x*(x+1)
@KSS Manian • 03 Dec, 2013
5 = 30
4 = 20.
3 = 12.
2 = 6.
1 = 2.
(or)
6 = 42
3 = 18 Which one is right???
4 = 20.
3 = 12.
2 = 6.
1 = 2.
(or)
6 = 42
3 = 18 Which one is right???
@Sandeep Taurean • 06 Dec, 2013
12
@Shailaja Tiwari • 07 Dec, 2013
ans: 12
time taken<20secKaustubh Katdare😀
- 9 = 90
- 8 = 72
- 7 = 56
- 6 = 42
- 3 = ??
ans: 12
@Aadit Kapoor • 07 Dec, 2013
ans : 18 (time taken 9 seconds)
explanation-:
9 = 90
8 * 9 = 72
7 * 8 = 56
6 * 7 = 42
3 * 6 = 18
explanation-:
9 = 90
8 * 9 = 72
7 * 8 = 56
6 * 7 = 42
3 * 6 = 18
@Sanyam Khurana • 07 Dec, 2013
12..
Took like just 2 sec 😛
Took like just 2 sec 😛
@Anoop Kumar • 07 Dec, 2013
What is logic for getting 18?
@Shailaja Tiwari • 08 Dec, 2013
they must have done by this way :ianoopWhat is logic for getting 18?
- 9 = 90
- (8*9=72)
- 8 = 72
- ( 7*8=56)
- 7 = 56
- (6*7=42)
- 6 = 42
- (3*6=18)
- 3 = ??
@Anoop Kumar • 08 Dec, 2013
Why not x = x*(x+1).
Really this is logic😨 , where did 9=90 came from☕ and why 3 came in series after 6, while other numbers are just x-1.Shailaja Tiwarithey must have done by this way :
- 9 = 90
- (8*9=72)
- 8 = 72
- ( 7*8=56)
- 7 = 56
- (6*7=42)
- 6 = 42
- (3*6=18)
- 3 = ??
Why not x = x*(x+1).
@Shailaja Tiwari • 09 Dec, 2013
9=90 - as 8 is multiplied with its higher consecutive no. 9,similarly they must have added 9 with its higher consecutive no.10.
and don't know about the series problem ,others may not have noticed it
and don't know about the series problem ,others may not have noticed it
@Shailaja Tiwari • 09 Dec, 2013
anyway what's the right answer/
😨
😨
@Ajay Pandey • 09 Dec, 2013
Right answer is 18 or 12 depends on ur logic.In objective exams, options must be either 12 or 18 not both.My answer is 12 bcos first match a pattern and then relation between consecutive options.
@Anoop Kumar • 09 Dec, 2013
Still not convinced, how some of us getting 18.Ajay PandeyRight answer is 18 or 12 depends on ur logic.In objective exams, options must be either 12 or 18 not both.My answer is 12 bcos first match a pattern and then relation between consecutive options.
@Ajay Pandey • 09 Dec, 2013
8*9=72
7*8=56
6*7=42
3*6=18
by wrong logic ......😀 right answer is 12
7*8=56
6*7=42
3*6=18
by wrong logic ......😀 right answer is 12
@sargam shukla • 09 Dec, 2013
12Kaustubh KatdareFound this puzzle on LinkedIn and I think it's a good mental exercise. Not at all difficult to crack, but should give you a good 30 seconds 😀
If you take more than 30 seconds to crack this, you've gotta be needing some brain exercise. Spend time on CE and keep your brain engaged!
- 9 = 90
- 8 = 72
- 7 = 56
- 6 = 42
- 3 = ??
@Aadit Kapoor • 11 Dec, 2013
write a program to print a message without using printf function.
@Raj A • 14 Dec, 2013
12
@Sarathkumar Chandrasekaran • 14 Dec, 2013
12
@madhu27 • 18 Dec, 2013
12 or 18 based on our assumption....
But i think 12 suits the most....
Took <15 s.....
But i think 12 suits the most....
Took <15 s.....
@jeshukb09 • 28 Dec, 2013
18
@yogi.bharadwaj • 28 Dec, 2013
it should be 12Kaustubh KatdareFound this puzzle on LinkedIn and I think it's a good mental exercise. Not at all difficult to crack, but should give you a good 30 seconds 😀
If you take more than 30 seconds to crack this, you've gotta be needing some brain exercise. Spend time on CE and keep your brain engaged!
- 9 = 90
- 8 = 72
- 7 = 56
- 6 = 42
- 3 = ??
@vijay jangid • 05 Jan, 2014
12
@Karthikeyan jaisankar • 07 Jan, 2014
18🎉
@KenJackson • 07 Jan, 2014 • 1 like
BTW. The answer to your puzzle is trivial if using one of the many computer languages that don't have a printf function.
At first I thought you must have posted in the wrong thread. But now I think I see that you think the answer 18 is bad logic, a non sequitur, so you posted your own non sequitur to protest. Right?Aadit Kapoorwrite a program to print a message without using printf function.
BTW. The answer to your puzzle is trivial if using one of the many computer languages that don't have a printf function.
@pavani kumari • 31 Aug, 2014
its 18Kaustubh KatdareFound this puzzle on LinkedIn and I think it's a good mental exercise. Not at all difficult to crack, but should give you a good 30 seconds 😀
If you take more than 30 seconds to crack this, you've gotta be needing some brain exercise. Spend time on CE and keep your brain engaged!
- 9 = 90
- 8 = 72
- 7 = 56
- 6 = 42
- 3 = ??
@Shashank Moghe • 12 Sep, 2014
Well 18 (3-4 seconds). Also, if you (want to) intrapolate the series, the answer comes to 12. There seems to be a confusion as to which one is correct.
If it were up to me , I would justify 18 as the correct answer because of the way the question is presented. I was not "told to" intrapolate.
If it were up to me , I would justify 18 as the correct answer because of the way the question is presented. I was not "told to" intrapolate.
@Karthikeyan jaisankar • 13 Sep, 2014
18!!! 😀
@ManojKiran Eda • 19 Sep, 2014
12
@Satheesh S.S • 06 May, 2015
a*(a+1) so 12
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