1001 = 12^3 + 02^2 + 02^1 + 12^0 = 8 + 0 + 0 + 1 = 9
10101 = 12^4 + 02^3 + 12^2 + 02^1 + 1*2^0 = 16 + 0 + 4 + 0 + 1 = 21
111001 = 12^5 + 12^4 + 12^3 + 02^2 + 02^1 + 12^0 = 32 + 16 + 8 + 0 + 0 + 1 = 57
10111101 = 12^7 + 02^6 + 12^5 + 12^4 + 12^3 + 12^2 + 02^1 + 12^0 = 128 + 0 + 32 + 16 + 8 + 4 + 0 + 1 = 189
1001 = 12^3 + 02^2 + 02^1 + 12^0 = 8 + 0 + 0 + 1 = 9
10101 = 12^4 + 02^3 + 12^2 + 02^1 + 1*2^0 = 16 + 0 + 4 + 0 + 1 = 21
111001 = 12^5 + 12^4 + 12^3 + 02^2 + 02^1 + 12^0 = 32 + 16 + 8 + 0 + 0 + 1 = 57
10111101 = 12^7 + 02^6 + 12^5 + 12^4 + 12^3 + 12^2 + 02^1 + 12^0 = 128 + 0 + 32 + 16 + 8 + 4 + 0 + 1 = 189