1
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1 $\to$ 4 $\to$ 6
2 $\to$ 3 $\to$ 7
19 $\to$ 16 $\to$ 11
8 $\to$ 14 $\to$ 12
15 $\to$ 17 $\to$ 19
18 $\to$ 13 $\to$ __

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5
  • $\begingroup$ Logical deduction AND lateral thinking? $\endgroup$ – JMP Sep 22 '19 at 20:05
  • $\begingroup$ I think lateral thinking is a more apt tag than logical thinking so removed it. $\endgroup$ – CMSnoob Sep 22 '19 at 20:11
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    $\begingroup$ Removing one tag is a kind of a hint. $\endgroup$ – z100 Sep 22 '19 at 21:01
  • $\begingroup$ The last number in consecutive sequences have a difference of 1. So, that way it should be 20. $\endgroup$ – Ajay Sep 24 '19 at 10:07
  • $\begingroup$ It's a time to give a hint. Letters, hours of a day, something else? $\endgroup$ – z100 Sep 30 '19 at 21:32
3
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Possible guess:

It was an even number: 10.
Also possibly one of the two 19 was actually 9.
Since the number used was: 1,2,3,4,?,6,7,8,?,?,11,12,13,14,15,16,17,18,19
Pattern:

O E E
E O O
O E O
E E E
O O O
E O ?

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1
  • $\begingroup$ It is two 19's and not a 9. $\endgroup$ – CMSnoob Sep 23 '19 at 7:59
0
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Sum of each row- 11 12 36 34 51 Since sum of first two rows show increment of 1 and sum of next two rows show decrement of 2 and sum of fifth row is 51 therefore there should be increment of 3 between row 5 and 6. So the answer is 23 which gives 54 as sum of last row.

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-3
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Answer is 23. You have to to find the patter and let post it wether you have find something new. I am typing all this because my answer has to be more than 30 character long.

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1
  • 1
    $\begingroup$ Welcome to Puzzling.SE! Can you please explain how you obtained that answer? It's not clear in the current state of your answer. Happy puzzling :) $\endgroup$ – Zoir Sep 24 '19 at 5:04

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