Binary Quiz - Year 7

Which of the following best describes binary?

• A system using ten digits (0–9).

• A system that uses only two digits: 0 and 1.

• A system that uses letters and numbers.

• A system used only for addition.

What is the binary representation for the number 1.

• 1

• 0

• 10

• 11

What is the binary value of 7?

• 0111

• 1010

• 1001

• 1100

What is the denary value of the binary number 0111?

• 5

• 6

• 7

• 8

What is the largest binary place value smaller than or equal to 19?

• 16

• 32

• 8

• 4

Which of the following is the correct step to convert 13 to binary?

• Subtract 8, write 1 under 8, then stop.

• Subtract 16, write 1 under 16, and continue.

• Subtract 8, write 1 under 8; subtract 4, write 1 under 4; subtract 1, write 1 under 1.

• Subtract 4, write 0 under 4, and stop.

If a binary number is 1011, what is its denary value?

• 9

• 10

• 11

• 12

How many binary digits (bits) are required to represent the number 25?

• 3 bits

• 4 bits

• 5 bits

• 6 bits