Year 9 - HF4: 1 - Binary, Decimal and Hex

What is the name of the Base 10 number system?

• Binary
• Denary
• Hexadecimal

Computers can only process information using 0s and 1s

• TRUE
• FALSE

How many bits do I need to be able to store the numbers from 0-255 (256 numbers)?

• 6
• 7
• 8
• 9

State the binary representation for the decimal number 17

• 0001 0001
• 1000 1000
• 0010 0001
• 0001 0010

State the decimal representation for the binary number 0011 1101

• 60
• 61
• 62
• 63

State the decimal representation for the hexadecimal number D

• 12
• 13
• 14
• 15

Convert the hexadecimal number C9 to binary

• 1100 1001
• 1100 1000
• 1100 1010
• 1100 0101

Why is it easier to use hexadecimal compared with binary ?

• Easier to remember 1 hex digit compared with 4 binary digits
• Easier to read - letters compared with numbers
• Saves memory - only 1 character compared with 4
• Easier to remember

The hexadecimal number FF has the value of 255 in binary

• TRUE
• FALSE

What is the maximum binary value I can represent if I use 6 bits (0011 1111)?

• 127
• 63
• 31
• 15