Find the missing number?

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1. Nishchal Mishra says

   April 8, 2020 at 10:51 am

   Using matrix calculation and determinant form , answer of this question is 97.
   See the similarities-
   (7*-13)+(5*30)+42=101
   (6*-13)+(2*30)+42=24
   (8*-13)+(3*30)+42=28
   hence ,
   (5*-13)+(4*30)+42=97
   Why we multiply greater term by -13 and lesser term by 30 and add 42, if you are interested to know that you can use inverse matrix method for this.

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