Number Series Test For Genius

Find The Number:

What number comes at Question Mark in a given number Series:

Q 1:
100, 96.75,93.5, 90.25,87, ?

Q 2:
0, 100, 6, 94,12, 88,18, 82,?,?

Q 3:
17,34, 51,68, ?

Q 4:
100, 50,200,25, 400, ?

Q 5: 
2, 5.75, ?, 13.25, 17,20.75

Q 6:
1, 1, 2, ?, 24,120,720

Q 7:
100, 98,94, 88,80, 70,?

Q 8: 
0, 1, 4, 9, 16,25, 36,49, ?

Q 9:
9, 18,27, ?, 45,?,63

Q 10:
1.5, 3, 5.5,9,13.5, ?