IPMAT Rohtak (LR) PYQs

Look at this series: 544, 509, 474, 439, ... What number should come next?

Find the missing number in the given series 12, 38, 116, 350, 1052, ?

What should come at the place of question mark? $\newline 46080, 3840, 384, 48, 8, 2, ?$