Binary Math

Question 1

What is an octet?

Answer 1

8 bytes. (8x8 bits).

Question 2

How to convert a decimal into a binary number?

Answer 2

If the decimal value is less than 128 then 1 and minus 128 from the decimal value then if that number is less than 64 then 1 and minus 64 from the decimal value and so on.

Question 3

Convert 42 into binary.

Answer 3

128 = 0 64 = 0 32 = 1 16=0 8=1 4=0 2=1 1=0 So: 00101010

Question 4

Convert 10111011 into decimal.

Answer 4

128+0+32+16+8+0+2+1=187 IF THERE IS A 1 as the last binary digit the decimal is always ODD if a 0 then EVEN decimal.