Q1: Convert 11001001₂ (binary) to decimal.

ANS:A - 201

Given the code-->1001001.

According to the 8421 code formate
i.e
Least significant bit(LSB) must be 1(from the left).
and the order increase on by n*2 i.e if 2 considered 2*2=4 and 4*2=8.....................so on
as from the same formate.

MSB(Most significant bit)bit in the question is 128.
So the answer is;

11001001------>1*(128)+1*(64)+0*(32)+0*(16)+1*(8)+0*(4)+0*(2)+1*(1)=>201.