taming binary questions..

[Bharathi Balasubramanian]

I am wondering is anybody got an easy solution/formula to solve the binary related questions?
I would value any input regarding this.
Thanks in adv.

[Jessica Sant]

I think the easiest way to handle the binary questions is to learn/understand binary and simply work through them.
ex:
5 & 9 = ?
(first convert to binary and find the result)
0101 & 1001 = 0001
(second convert the answer to decimal)
5 & 9 = 1
find two's compliment of 77
(convert 77 to binary)
0100 1101
(invert the digits)
1011 0010
(add 1)
1011 0011
(convert to signed decimal)
-51
.... hmmmm did I do that right?
[ November 16, 2002: Message edited by: Jessica Sant ]

[Bert Bates]

Jessica - I think you're trying to trick us! 1011 0011 is -77... it's true that 00110011 is 51, but you don't just flip the sign bit to get a negative number... you've got to do the whole 2's compilment tango... were we on our toes?

[Valentin Crettaz]

Also check out our campfire story: Cat and Mouse Games with Bits