State true or false:
The largest product among
(a) 0.101 x 0.01
(b) 0.01 x 0.001
(c) 0.10 x 0.001
(d) 0.101 x 0.001
is (d) 0.101 x 0.001
Find the missing term: 2, 6, 12, 20, 30, 42, 56, 72, _