Binary numbers

What is the decimal equivalent of the binary number 1001?

• 9

• 8

• 10

• 11

What is the decimal equivalent of the binary number 10101?

• 23

• 21

• 20

• 22

What is the decimal equivalent of the binary number 11001100?

• 204

• 206

• 207

• 205

What is the binary representation of the decimal number 12?

• 1100

• 1101

• 1011

• 1110

What is the binary representation of the decimal number 42?

• 101100

• 101011

• 101010

• 101001

What is the binary representation of the decimal number 188?

• 10111100

• 10111011

• 10111101

• 10111001

What is the first step in converting a decimal number to binary?

• Add the biggest place value possible

• Multiply the number by 2

• Subtract the biggest place value possible from the decimal number

• Divide the number by 2

What does a binary system use as symbols?

• 0 to 9

• 1 and 2

• 0 and 1

• A and B

What is the base of the binary number system?

• 2

• 10

• 8

• 16

How is the number 84 represented in binary?

• 01010100

• 01010101

• 01010010

• 01010011