Bits and Bytes

1. What is a Digit-The easiest way to understand bits is to compare them to something you know: digits. A digit is a single place that can hold numerical values between 0 and 9. Digits are normally combined together in groups to create larger numbers.
2. “normal” counting numbers used in everyday life a based on what sequence of numbers? On the sequence of digits from 1-9.
3. Where does the word bit originate from? The word bit is a shortening of the words "Binary digIT.
4. Binary numbers don’t use base 10. What base do they use? What digits are available in base 2?  Binary numbers use a base of 2. The digits available in the base 2 are squared numbers.
5. Examine the tables below

Base 10

Place Value	10 000	1 000	100	10	1
Place Value	104	103	102	101	100
Digit	9	0	3	0	2
Digit Value	90 000	0	300	0	2

6. Examine the table below

Base 2

Place Value	16	8	4	2	1
Place Value	24	23	22	21	20
Digit	1	0	1	0	0
Digit Value	16	0	4	0	0

7. What is a byte?
   1. A group of binary digits or bits (usually eight) operated on as a unit.
   2. Such a group as a unit of memory size.
8. How many bytes in a kilo, mega, giga and tera bytes. A byte contains 8 bits, 220 bytes or, loosely one million bytes in a megabyte, one billion bytes make a  gigabytes,   terabyte is one million million bytes (1012) or strictly, 240 bytes .
9. Complete the following conversions;

1000 Mb =  1 ?Gb 

500 Gb = 500 00 ? Mb

5000 Kb = 5000 000 ? Mb