Number systems - Binary

Convert 128 to binary

• 10000000
• 01111110
• 10000001
• 11001100

Convert 65 to binary

• 01100001
• 00100001
• 01000001
• 00100101

Convert 37 to binary

• 00100101
• 00100011
• 00100111
• 01000101

Convert 00010001 to decimal

• 17
• 27
• 37
• 47

Convert 11111111 to decimal

• 255
• 245
• 235
• 225

Convert 11001100 to decimal

• 224
• 134
• 104
• 204

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

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

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

What is the point of binary?

• It represents how computers interpret electrical signals

• Because we like to make you do extra math

• It is fun

• 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