Number Systems - Hexadecimal

Which number system are these examples of?
2A    7F    1C

• Binary
• Denary
• Hexadecimal

What letters does hexadecimal use?

• A-F
• A-D
• P-W
• A-Z

Why do we still use/need binary if hexadecimal is better?

• Because it is easier to understand
• Because computers use binary not hexadecimal
• There is no reason it is just the way it is

What is 130 in hexadecimal?

• 82
• 94
• 66
• 76

What is 10010101 in hexadecimal?

• 95
• 75
• 44
• A2

Convert the Hex number 1F to binary.

• 00111111
• 00001111
• 00010111
• 00011111

Convert the Hex number B9 to binary.

• 10111001
• 10111000
• 10111101
• 10101001

What does 5F equal in denary?

• 90
• 95
• 100
• 105

Which of the following is equivalent to 'thirteen'?

• D  in hexadecimal
• 1011 in binary
• XXIII in Roman Numerals
• 54 divided by 4

Convert the binary number 01011111₂ to hexadecimal.

• 3A₁₆
• 7D₁₆
• AF₁₆
• 5F₁₆