Find the missing number.
A190
B221
C136
D131
there is also one more explanation that is 7 4 =11, (4*2=8) 11 8 = 19, (8*2=16) 19 6=35 , (16*2 = 32) 35 32=67 , (32*2=64) 67 64=131 thus this is a simpler way of doing it hope it helped you.