Question

Find the missing number in series: 3, 6, 24, 192, _________

Answer 1

The series goes as 
3×2=6
6×4=24
24×8=192
∴192×16=3072

Answer 2

Here ,
3 x 2 = 6
6 x (2x2) = 24
24 x (2x2x2) = 192
192 x (2x2x2x2) = 3072

So your required answer is 3072

Hope This Helps You!