[AP CSP] Binary Number System

Convert 1111 1111 to decimal

• 255

• 256

• 201

• 225

Convert 0010 0100 to decimal

• 26

• 36

• 46

• 56

Convert 0100 0100 to decimal

• 58

• 68

• 78

• 88

How many possible numbers can be represented with 1 Byte?

• 255

• 256

• 128

• 129

What are the symbols used in the binary number system?

• 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 0100 0001.

Can you infer what the letter B would be?

• 0001 0010

• 0100 0010

• 0101 0110

• 0000 0001