Binary homework

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

Why do computers use the binary number system?

• A CPU has 2 transistors

• To represent the 2 different states of transistors (on and off)

• To allow the CPU to be in one of 2 states

How would you write the number two in binary?

• 1001

• 0001

• 0000

• 0010

What is the binary representation of 17?

• 0001 0010

• 0001 0001

• 0000 1101

• 0010 0010

Convert 128 to binary

• 1000 0000

• 0111 1110

• 1000 0001

• 1100 1100

Convert 11111111 to decimal

• 255

• 245

• 235

• 225

Which of these are the correct place values for binary?

• 128,64,32,16,8,4,2,1

• 128, 68,34,12,6,4,2,1

• 1,0

• 0,1

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

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

How many pixels are used to create this image?

• 3

• 4

• 8

• 64

A pixel is...

• not determined by used input.

• the most important factor in determine the colours available for an image.

• the smallest controllable part of a computer screen.