# Through which number we can remove the question mark?

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.

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)

Simple:

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

• 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. $(+1)$ ;) – Mr Pie Dec 10 '18 at 13:52
• @user477343; I thought the 10 was 'puzzle number 10'! – JMP Dec 10 '18 at 14:13
• Also the top box is -0 if you consider the 10 as the merging of two cells with 10 in it. – boboquack Dec 11 '18 at 2:10

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

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

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

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


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

• @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. – rhsquared Dec 11 '18 at 15:03