7
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enter image description here

I'm trying to solve this puzzle but so much confused and can't understand even.Please help me to solve this puzzle and also explain briefly.

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24
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Another way to see it (which also includes the 10 in the rule) is:

Diagonally (starting in top left corner): 10-13-16-19-22 (+3)
Diagonally (starting in top right corner): 10-8-6-4-2 (-2)

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18
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Simple:

+5, -10, +15, -20. The answer is $2$.

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  • $\begingroup$ Your pattern is, actually, the selfsame as stated in @Runemoro's answer (just a bit less complicated). If I could upvote you again to match upvotes, I would. $(+1)$ ;) $\endgroup$ – user477343 Dec 10 '18 at 13:52
  • $\begingroup$ @user477343; I thought the 10 was 'puzzle number 10'! $\endgroup$ – JonMark Perry Dec 10 '18 at 14:13
  • $\begingroup$ Also the top box is -0 if you consider the 10 as the merging of two cells with 10 in it. $\endgroup$ – boboquack Dec 11 '18 at 2:10
3
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I got the same answer as everyone else but used a different method. Thought I'd still share.

10 + 10 = 20
08 + 13 = 21
16 + 06 = 22
04 + 19 = 23
22 + ?? = 24
24 - 22 = 02
? = 2

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1
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You could also consider that the sum of the outer values in each column minus the inner equals $10$, so

$8+22 - (16+4) =10$
$13+? - (6+19) = 10 \Rightarrow ? = 22. $

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1
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After reading the other answers I think I worked this out in a really convoluted way - but thought I'd share anyway:

Comparing to 10, the smaller number decrease is 2 thirds of the larger number increase

 13 = increase of  3  ->  2 thirds of  3 = 2  ->  10 - 2 = 8 
16 = increase of 6 -> 2 thirds of 6 = 4 -> 10 - 4 = 6
19 = increase of 9 -> 2 thirds of 9 = 6 -> 10 - 6 = 4
22 = increase of 12 -> 2 thirds of 12 = 8 -> 10 - 8 = 2
Which gives the answer of 2

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-1
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Plese correct me if im wrong

10,
8-13 , 8+3 =11,
16-6, 6+6 =12,
4-19,9+4 =13,
22-?,12+2=14

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  • $\begingroup$ @NavyaRavathi Hello and welcome to PSE. Please familiarise yourself with the site rules. You've added a solution to a puzzle with an accepted solution. Also your answer is very unclear. And finally you should use spoilers to hide your answers. $\endgroup$ – rhsquared Dec 11 '18 at 15:03

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