This is a geometric progression pattern with the common ratio of negative 0.5.
The next three would be -0.5, followed by 0.25, followed by -0.125
F should be -1, 6
E should be -4, 2
D should be -4, 9
Eric has 46 total marbles (4*10)+6
Hi ;-)
10 minutes for 2 songs = 5 minutes per song
10 : 2 = 5