mathematics help: Which of the following binary numbers could be a binary coded decimal? - Help.com

a and b
because you need 4 bits to represent BCD.

da-1 is right because B is larger than 9

B=1000=8
plus 0010=2
plus 0001=1
total is 11 its not allowed as a BCD

B,C,D are just plain binary.Or Hex.
B=1011 in Hex is just B
1,2,3,4,5,6,7,8,9,A,B,C,D,E,F

spiratec9 wrote:
B,C,D are just plain binary.Or Hex.
B=1011 in Hex is just B
1,2,3,4,5,6,7,8,9,A,B,C,D,E,F

Mistake add Or decimal

A,B,C,D all could be decimal of coarse

look at wikipedia - (a) is the only one that works

in bcd, each decimal is converted into a 4 bits binary value

Decimal: 0 1 2 3 4 5 6 7 8 9
BCD: 0000 0001 0010 0011 0100 0101 0110 0111 1000 1001

a) 1000 -> 8
b) 1011 -> nothing, this can’t be converted into a decimal from 0 to 9
c) 11011011 -> nothing coz the first 4 bits are 1101, and this can’t be converted into a decimal from 0 to 9
d) 11001110 -> nothing coz the first 4 bits are 1100, and this can’t be converted into a decimal from 0 to 9

Try with this a href=”http://www.stringfunction.com/binary-decimal.html”>binary to decimal /a>, convert 4bits a time!
David

sorry to post twice, but the link of the tool I mentioned to convert binary to decimal is http://www.stringfunction.com/binary-…