數學知識交流---進制問題(2)

x(y) mean x in y 進制

11(10) = A
12(10) = B
13(10) = C
14(10) = D
15(10) = E
16(10) = F
...
30(10) = T
31(10) = U
...
35(10) = Y
36(10) = Z

Question 1.

823641 (9) = ? (3) = ? (4) = ? (5)

Question 2.

321041 (6) = ? (2) = ? (16) = ? (20)

Question 3.

9310AB(13) = ? (7) = ? (8) = ? (5)

Question 4.

HNA4Q (32) = ? (19) = ? (7)