[AP CSP] Binary Conversion

Convert 11111111 to decimal

• 255
• 245
• 235
• 225

Convert 00100100 to decimal

• 26
• 36
• 46
• 56

Convert 01000100 to decimal

• 58
• 68
• 78
• 88

Convert 11001100 to decimal

• 224
• 134
• 104
• 204

What are the only two numbers you can use in binary?

• 0 and 1
• 1 and 2
• 1, 2, 3, 4, 5, 6, 7, 8, 9, 10
• 1, 2, 4, 8, 16

If a binary number ends with a 1, it must be...

• An odd number
• An even number
• A prime number
• The number 12

Which of these is the correct sequence for the place values for binary numbers?

• 1, 2, 4, 8, 16, 32, 64, 128
• 1, 2, 4, 6, 8, 10, 12, 14, 16
• 1, 2, 3, 4, 5, 6, 7, 8
• 0, 1

What is the point of binary?

• It represents how computers interpret electrical signals
• Because we like to make you do extra maths ;-D
• For the lulz
• Because it describes star systems

How is our number system different from the binary system?

• Our number system is base-5; the binary system is base-3
• Our number system is base-10; the binary system is base-2
• Our number system is base-10; the binary system is base-1
• Our number system is base 100; the binary system is base-2

Your computer's code for the letter A is 01000001. Can you infer what the letter B would be?

• 10010
• 01000010
• 01010110
• 00000001