Answer or Explanation of the problems

Answer of Figure 

  Since these circles have been divided into two eight  equal parts.  To get  its answer add all the numbers which are in opposite ,in all the four parts of both the circles, Since the sum of these  numbers must be 25 in each case
1st    4  + 11 + 3 + 7 = 25
2nd  10 + 1 + 9 + 5 = 25
3rd   11 + 6 + 2 + 6 = 25

In the same way sum of 8 ,5. ,5 and ? must be 25
4th 8 + 5 +5 + ? = 25
 ? = 25 - 18 = 7

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So 7 is the correct option 

Answer of this Matrix 

As we know the symmetric  matrix is that matrix , whose transpose is equal to the matrix itself .i. e. All the elements of 1st row must be equal  to the elements of  1st column,Similarly all the elements of 2nd row must be equal  to the elements of  2nd column and same must be  true for 3rd row and column.

And in case of given problem , 1st row and 1st  column are same and  2nd row and 2nd column are also same . And also 1st two  elements of 3rd row and column  are same
But what about the last element of 3rd row and 3rd column?

So last element of 3rd row could be any number ,any alphabet or any special character . it hardly have any role to play  for the symmetric property of the Matrix.

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  1. You are saying that we cant solve skew symmetric matix i can solve it because i am now in 7th class i amm studying iit syllabusn in our school