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Who has the right answer
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Apr 21, 2016 23:58:31   #
Swede Loc: Trail, BC Canada
 
1+4 =5
2+5=12
3+6=21

8+11= ??

:shock: Swede :thumbup: :thumbup:

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Apr 22, 2016 00:06:17   #
John_F Loc: Minneapolis, MN
 
40

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Apr 22, 2016 00:33:35   #
Shellback Loc: North of Cheyenne Bottoms Wetlands - Kansas
 
96

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Apr 22, 2016 04:01:43   #
Leicaflex Loc: Cymru
 
72

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Apr 22, 2016 04:40:02   #
coffee55 Loc: Co. Durham, England.
 
96

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Apr 22, 2016 05:07:16   #
Doddy Loc: Barnard Castle-England
 
40

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Apr 22, 2016 05:35:57   #
Growler Loc: The Great South Land
 
Swede wrote:
1+4 =5
2+5=12
3+6=21

8+11= ??

:shock: Swede :thumbup: :thumbup:


96 :thumbup:

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Apr 22, 2016 06:17:36   #
DirtFarmer Loc: Escaped from the NYC area, back to MA
 
Swede wrote:
1+4 =5
2+5=12
3+6=21

8+11= ??

:shock: Swede :thumbup: :thumbup:


First of all, there is no "right answer".

The object is to determine just what the "+" operator in those examples means from only 3 given examples.

There are many interpretations, but one of them is that that operator works as follows:
A + B --> (A multiplied by B) added to A
If that is the interpretation, then 8 + 11 = (8 times 11) plus 8, or 96

I would be curious to see how you define the operator to get 40 or 72

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Apr 22, 2016 07:20:00   #
Longshadow Loc: Audubon, PA, United States
 
Swede wrote:
1+4 =5
2+5=12
3+6=21

8+11= ??

:shock: Swede :thumbup: :thumbup:


It's a progression.
2+5=7 add the previous answer(5) =12
3+6=9 add the previous answer(12) =21
...
4+7=11 add the previous answer(21) = 32
(Only one right answer.)
Sorry, I'd finish it, but gotta get ready for work...

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Apr 22, 2016 07:24:54   #
ronr
 
No fancy math involved just add as follows:
1+4=5
2+5+5=12
3+6+12=21
8+11+21=40
The operator just needs to add, don't understand the new math and too old to learn.

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Apr 22, 2016 07:54:48   #
Longshadow Loc: Audubon, PA, United States
 
ronr wrote:
No fancy math involved just add as follows:
1+4=5
2+5+5=12
3+6+12=21
8+11+21=40
The operator just needs to add, don't understand the new math and too old to learn.


I took the line space between the first three and the last as an implied ellipsis.

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Apr 22, 2016 08:10:13   #
dfran Loc: Dallas, Pa
 
John_F wrote:
40


Answer is 96...next is 4+7=32 (21+11), 5+8=45, 6+9=60, 7+10=77, 8+11=96

Total of the previous two numbers + the total of the next two!

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Apr 22, 2016 08:15:11   #
dfran Loc: Dallas, Pa
 
John_F wrote:
40


Answer is 96...next is 4+7=32 (21+11), 5+8=45, 6+9=60, 7+10=77, 8+11=96

Total of the previous two numbers + the total of the next two!

Reply
Apr 22, 2016 08:57:22   #
DavidPhares Loc: Chandler, Arizona
 
I am with the 40 crowd. Only because the explanations posted above make sense. I am too math dumb to have figured it for my self. The only math I seem to have mastered is computing depth of field! 😃

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Apr 22, 2016 09:48:41   #
superswimmermom Loc: New York
 
96

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