128 : 96 : : 244 : ?

In each of the following questions, select the related letter/word/ number from the given alternatives.
8 : 584 :: 4  : ?

Select the combination of letters that when sequentially placed in the gaps of the given letters series will complete the series.
b_bab_bc_abbb_ba_b

G is father than H but not as fat as M. Q is also not as fat as M. Who is the most lean person in the group?

If 5=10, 6=18, 7=28 then 8=?

If Friday falls on 15th of September 2000, what will be the day of 15th of September 2001? 

which of the following meanings of the arithmetical signs will yield the value ' zero ' for the expression given below?
200x100 + 300 x 200 10÷2 + 40

7 : 30 :: 17 : ?