(a)
2, 6, 5, 4, 0, 2 and 8 are 7 digits.
30/7 = 4R2
R2 ——-> 6

(b)
100/7 = 14R2
(2 + 6 + 5 + 4 + 0 + 2 + 8) x 14 + 2 + 6 = 386

Ans : (a) 6; (b) 386.