5 11 6 9 13 18 11 20 21 25 16 ?

31 is the ans as if all the columns have same difference so the last column has a difference of 11

Ans - 31 As 5+ 8=13+8=21 11+7=18+7=25 6+5=11+5=16 9+11=20+11= 31

(13-5)+13 = 21 (18-11)+18 = 25 (11-6)+11 = 16 (20-9)+20 = 31

so, 31 is the answer.

Ans is 31 , because the difference in two rows is 31 .

31 is the Answer

5+ 8=13+8=21 11+7=18+7=25 6+5=11+5=16 9+11=20+11= 31

IF 1,3,3=5 9,7,4=8 11,14,10=15 20,16,12=18 Than 3,6,7=?

What number should replace the question mark?

12 - - - 25

5 - - - 11

21 - - - 43

18 - - - 37

2 - - - ?

? + ? + ? + ? + ? = 30

You have to fill numbers in place of question marks. The numbers that you can use are 1, 3, 5, 7, 9, 11, 13 and 15. You can repeat the numbers if you like.