13 because sum of next diagonal numbers is 22 and the next one 30. therefore this diagonal should add to 14.

increament of 4..then ans is 13.

13 will be the answer. add 4 in the previous number.

The number will be 13

13 will be part of last circle in place of question mark.

correct answer is 13

The step is 4 so the answer is 9+4=13

In the picture given below, can you find out which digit will take place of the question mark?