2.1.1 Need for Binary

What numbers are used in binary code?

• any whole numbers

• 1 - 10

• 0 and 1

• 1 - 9

What does the word binary mean?

• zero

• two

• many

• one

Which number represents that the circuit is "off" or closed?

• zero

• two

• ten

• one

Convert the decimal number 37 to binary.

You'll need the following places:

32s . 16s . 8s . 4s . 2s . 1s

• 100101

• 110011

• 101101

• 100010

Convert 10001 from binary to decimal.

• 17

• 27

• 37

• 47

What is 12 in binary?

• 0010
• 1010
• 1100
• 1111

How many values can be stored with 4 bits?

What range of values can be stored with 4 unsigned bits?

• 1 - 4

• 0 - 15

• 1 - 15

• 0 - 4

What range of values can be stored with 8 unsigned bits?

• 1 - 8

• 0 - 255

• 0 - 256

• 0 - 8

The circuits in a computer's processor are made up of billions of _________. A __________ is a tiny switch that is activated by the electronic signals it receives. The digits 1 and 0 used in binary reflect the on and off states of a ________.