Find the missing number in the following matrix?
5, 9, 8, 7 8, 6, 9, 10 7, 13, ?, 19 5, 7, 8, 9
See ccolumn wise (5+8+7)/4=5 (9+6+13)/4=7 (7+10+19)/4=9 Similarly (8+9+x)/4=8 Then x=32-17=15
Find the missing number in the following grid?