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Clock, calculator, bulb puzzle #1221610
07/01/20 10:12 PM
07/01/20 10:12 PM
Joined: Feb 2001
Posts: 10,699
Minnesota, USA
Sherlock Offline OP
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Can you find the answer to this puzzle? For some fun, for the first 24 hours, please put your answer in a spoiler.

[Linked Image]

Last edited by Sherlock; 07/03/20 10:36 PM.

The best math you can learn is how to calculate the future cost of current decisions.
Re: Clock, calculator, bulb puzzle [Re: Sherlock] #1221611
07/01/20 11:54 PM
07/01/20 11:54 PM
Joined: Apr 2006
Posts: 17,992
Chicago
oldbroad Offline
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[/spoiler] 810 [spoiler]


??

Last edited by oldbroad; 07/02/20 12:04 AM.
Re: Clock, calculator, bulb puzzle [Re: Sherlock] #1221613
07/02/20 01:35 AM
07/02/20 01:35 AM
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Isle of Man
Lex Offline
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The clock face is the hour shown, so 9 + the calculator is the total of the digits added up, so 9 again x 3 lightbulbs each showing 4 beams, and one beam appears to be 3 (on the basis that one 5 beam bulb is 15), so 36, making a total of 648 ...but perhaps there is something more devious going on...!
catrub

Last edited by Lex; 07/02/20 01:45 AM.

Life is what happens while you're making other plans.

Re: Clock, calculator, bulb puzzle [Re: Sherlock] #1221616
07/02/20 02:12 AM
07/02/20 02:12 AM
Joined: Jul 2003
Posts: 46,938
Ottawa Ontario CANADA
curly Offline
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369. Doing the multiplication first, Calculator, 10, times Bulbs, 36, beams = 360 + Clock, 9 for a total of 369.


If you can't dance, don't blame the dance floor.
Re: Clock, calculator, bulb puzzle [Re: Sherlock] #1221619
07/02/20 03:34 AM
07/02/20 03:34 AM
Joined: Nov 2004
Posts: 21,812
Bucks, England
Urban Worrier Offline
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333

hardwall

Last edited by Urban Worrier; 07/02/20 03:38 AM.

To waste one second of one's life is a betrayal of one's self.
I wonder what's on television...?
Re: Clock, calculator, bulb puzzle [Re: Sherlock] #1221621
07/02/20 05:53 AM
07/02/20 05:53 AM
Joined: Dec 2007
Posts: 15,004
Ohio
michele rose Offline
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solution: 9 + 9 X 36 = 9 + 324 = 333

Re: Clock, calculator, bulb puzzle [Re: Sherlock] #1221627
07/02/20 08:32 AM
07/02/20 08:32 AM
Joined: Jul 2002
Posts: 29,022
Unionville
manxman Offline
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9 + (9 x 36) = 333


Sometimes lost is where you need to be. Just because you don't know your direction doesn't mean you don't have one.
Re: Clock, calculator, bulb puzzle [Re: Sherlock] #1221628
07/02/20 08:35 AM
07/02/20 08:35 AM
Joined: Feb 2001
Posts: 10,699
Minnesota, USA
Sherlock Offline OP
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Nice start. So far, Rog, Michele and manxman have the correct answer. The rest of you can try again! grin


The best math you can learn is how to calculate the future cost of current decisions.
Re: Clock, calculator, bulb puzzle [Re: Sherlock] #1221646
07/02/20 12:08 PM
07/02/20 12:08 PM
Joined: Oct 2003
Posts: 11,590
The Garden State
LadyKestrel Offline
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9 + 240 (10 x 8) = 249


Edit: Oops! I think my lightbulbs are incorrect.

Last edited by LadyKestrel; 07/02/20 12:11 PM.

Carpe chocolate.
Re: Clock, calculator, bulb puzzle [Re: Sherlock] #1221648
07/02/20 12:43 PM
07/02/20 12:43 PM
Joined: Oct 2003
Posts: 11,590
The Garden State
LadyKestrel Offline
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Ah! It's all in the details: 9 + 324 = 333 I missed the change in the calculator and the rays of the lightbulbs.

Sneaky but good! yes


Carpe chocolate.
Re: Clock, calculator, bulb puzzle [Re: Sherlock] #1221652
07/02/20 01:40 PM
07/02/20 01:40 PM
Joined: Apr 2006
Posts: 17,992
Chicago
oldbroad Offline
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Attempt #2

54


(And I learned how to properly use the spoiler tag!)

Re: Clock, calculator, bulb puzzle [Re: Sherlock] #1221658
07/02/20 03:27 PM
07/02/20 03:27 PM
Joined: Feb 2001
Posts: 10,699
Minnesota, USA
Sherlock Offline OP
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LadyK thumbsup on your second try!

oldbroad, as LadyK said, "It's all in the details." Take another stab at it. wink


The best math you can learn is how to calculate the future cost of current decisions.
Re: Clock, calculator, bulb puzzle [Re: Sherlock] #1221665
07/02/20 05:13 PM
07/02/20 05:13 PM
Joined: Apr 2006
Posts: 17,992
Chicago
oldbroad Offline
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Attempt #3:

216


think

Re: Clock, calculator, bulb puzzle [Re: Sherlock] #1221670
07/02/20 06:34 PM
07/02/20 06:34 PM
Joined: Feb 2001
Posts: 10,699
Minnesota, USA
Sherlock Offline OP
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Not there yet. There are several details to pay attention to. yes


The best math you can learn is how to calculate the future cost of current decisions.
Re: Clock, calculator, bulb puzzle [Re: Sherlock] #1221684
07/02/20 08:49 PM
07/02/20 08:49 PM
Joined: Apr 2006
Posts: 17,992
Chicago
oldbroad Offline
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I think I can come up with a few more answers. Give me time lol.

Let's try:

6

Re: Clock, calculator, bulb puzzle [Re: Sherlock] #1221707
07/03/20 03:00 AM
07/03/20 03:00 AM
Joined: Mar 2004
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Isle of Man
Lex Offline
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This is a bit of a spoiler, but may help those still floundering: I had eventually spotted the alterations to the calculator and bulbs, but I was forgetting the mathematical rules of the road about priority between calculations - another Denisian puzzle! lol thumbsup

Last edited by Lex; 07/03/20 03:06 AM.

Life is what happens while you're making other plans.

Re: Clock, calculator, bulb puzzle [Re: Sherlock] #1221714
07/03/20 06:52 AM
07/03/20 06:52 AM
Joined: Aug 2000
Posts: 16,715
Doylestown, Pennsylvania
Redz Offline
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Exactly, Lex. whistle

Re: Clock, calculator, bulb puzzle [Re: Redz] #1221730
07/03/20 10:46 AM
07/03/20 10:46 AM
Joined: Feb 2001
Posts: 10,699
Minnesota, USA
Sherlock Offline OP
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oldbroad, take as much time as you need! lol

Lex, it's definitely about paying attention to details but you're also correct in that order of operations applies here. thumbsup


The best math you can learn is how to calculate the future cost of current decisions.
Re: Clock, calculator, bulb puzzle [Re: Sherlock] #1221748
07/03/20 12:56 PM
07/03/20 12:56 PM
Joined: Apr 2006
Posts: 17,992
Chicago
oldbroad Offline
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Yeah, I don't know. I think I give up though I'm not looking at any of the right answers yet in case I feel smarter a little later on blush.

Re: Clock, calculator, bulb puzzle [Re: oldbroad] #1221774
07/03/20 10:36 PM
07/03/20 10:36 PM
Joined: Feb 2001
Posts: 10,699
Minnesota, USA
Sherlock Offline OP
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For those still puzzled by this puzzle, here's the solution:

The clock = 9
The calculator = 9 (look closely at the numbers - 1224)
The lightbulbs = 36 (each ray is worth 3, there are 4 rays on each bulb so 3x12)
The equation: 9 + 9 x 36 = 333 (order of operations says to multiply first - 9 x 36 = 324 + 9) thumbsup


The best math you can learn is how to calculate the future cost of current decisions.
Re: Clock, calculator, bulb puzzle [Re: Sherlock] #1221780
07/03/20 11:48 PM
07/03/20 11:48 PM
Joined: Apr 2006
Posts: 17,992
Chicago
oldbroad Offline
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Thank you. I got all the numbers but I've never heard of the "order of operations says to multiply first" and I was an A++ math student way, way back (unless there were parenthesis involved)! Or, maybe I should say that I don't recall that part. rolleyes

Last edited by oldbroad; 07/03/20 11:59 PM.
Re: Clock, calculator, bulb puzzle [Re: Sherlock] #1221790
07/04/20 06:37 AM
07/04/20 06:37 AM
Joined: Aug 2000
Posts: 16,715
Doylestown, Pennsylvania
Redz Offline
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OB, way, way back in school when I (we?) went, parentheses were used. So, the problem would have
read either (x + y) x z, or x + (y x z). They added those "rules" much later, leaving out the much needed
parentheses and forcing students to remember the rules. rolleyes

Re: Clock, calculator, bulb puzzle [Re: Sherlock] #1221803
07/04/20 09:31 AM
07/04/20 09:31 AM
Joined: Mar 2004
Posts: 11,845
Isle of Man
Lex Offline
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I think that we were taught to add the brackets as appropriate when they had been omitted as part of the mathematical problem - like OB I scored quite well at maths in school, although I was rather stumped when we moved on from calculus to integration (not helped by having a teacher who was a mathematical genius but impatient with the mere mortals in his classroom!) smile

Last edited by Lex; 07/06/20 02:44 PM.

Life is what happens while you're making other plans.

Re: Clock, calculator, bulb puzzle [Re: Sherlock] #1221809
07/04/20 10:39 AM
07/04/20 10:39 AM
Joined: Nov 2004
Posts: 21,812
Bucks, England
Urban Worrier Offline
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We had the word BODMAS drilled into us -

Brackets
Of (eg 50% of 128)
Division
Multiplication
Addition
Subtraction

Never ever forgot it... smile


To waste one second of one's life is a betrayal of one's self.
I wonder what's on television...?
Re: Clock, calculator, bulb puzzle [Re: Urban Worrier] #1221814
07/04/20 10:57 AM
07/04/20 10:57 AM
Joined: Feb 2001
Posts: 10,699
Minnesota, USA
Sherlock Offline OP
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I don't remember what I was taught in school growing up. The middle school I worked at for 15+ years taught something similar to what Rog was taught:

Parentheses (includes brackets)
Exponents
Multiplication
Division
Addition
Subtraction


The best math you can learn is how to calculate the future cost of current decisions.
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