Binary/Decimal Conversions

Fill in the missing binary digit:

1 0 1 _ 1 = 21

• 1

• 0

Fill in the missing binary digit:

_ 0 1 1 1 = 23

• 1

• 0

Fill in the missing binary digits:

1 _ _ 1 = 13

• 10

• 11

• 01

• 00

Fill in the missing binary digits:

0 0 0 1 _ _ _ 1 = 27

• 101

• 111

• 000

• 100

How many binary bits are required to store the decimal number 27?

• 4 bits

• 5 bits

• 6 bits

• 7 bits

Answer explanation

If we add the first 5 binary place values we get 31.

16 + 8 + 4 + 2 + 1 = 31

So, any number less than 32 can be store with only 5 bits.

28 to binary

• 11100

• 11001

• 10011

• 00111

15 to binary

• 10000

• 1111

• 1000

• 111

Convert the binary number 1010 to decimal.

• 100

• 10

• 15

• 5

What is the decimal for the binary number 0011 1101

• 60

• 61

• 62

• 63

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