Verbal Reasoning - Mental Ability Questions

In the following question, select the missing number from the given series.
19, 38, ?, 228, 684, 1368

The weights of 4 boxes are 20, 30, 40 and 60 kilograms. Which of the following cannot be the total weight, in kilograms, of any combination of these boxes and in a combination a box can be used only once?

Rohan walks a distance of 3 kms towards North, then turns to his left and walks for 2 kms. He again turns left and walks for 3kms. At this point he turns to his left and walks for 3 kms. How far is he from the starting point?

If DECEMBER is coded as EDECBMRE then FEBRUARY will be coded as

If 37*14 = 17,
69*33 = 34,
91*125 = 72
then what should 28*56 = ?

In the following question, select the related number from the given alternatives.
56 : 41 : : 94 : ?

Anitha walked 20 km towards north. Then she turned right and walked 30km. Then she turned right and travelled 35 km. Then she moved left and walked 15 km. Finally she turned left and walked 15 km. In which direction was she from the starting point?

A series is given with one term missing. Select the correct alternative from the given ones that will complete the series.

D, I, N, S, ?