Binary Code

What two digits make up the binary number system?

• 1 and 10

• 0 and 1

• 1 and 9

• 2 and 4

Each binary digit is called a:

• Byte

• Bit

• Code

• Pixel

How many bits are in one byte?

• 4

• 8

• 10

• 16

Binary is called a base-2 system because:

• It has two types of computers

• It uses two digits: 0 and 1

• It multiplies by twos

• It skips every other number

Which of the following binary numbers equals the decimal number 10?

• 1000

• 1010

• 1100

• 1111

Convert the binary number 1101 to decimal.

Convert the decimal number 12 to binary.

Each place in a binary number represents a power of 2. Write the values for the first five places (from right to left): 1, ___, ___, ___, ___.

(a)  

In your own words, explain why computers use binary code instead of regular numbers or letters.