Binary Number Revision

1. 1. Binary digits are ___

• 1 and 2

• 0 and 1

• 0, 1 and 2

• 0 and 2

2. 2. Denary number is a number in _____

• base 2

• base 5

• base 7

• base 10

3. 3. Binary number is a number in ___

• base 2

• base 3

• base 5

• base 10

3. 4. Tayo was told to add these binary numbers; 1011 and 1100. What do you think will be the result?

• 1111

• 1011

• 10111

• 11011

5. 5. If I subtracted 11011 from a binary number to give 11011, what was the binary number?

• 111001

• 111010

• 10110

• 110110

6. 6. Sharon added two binary numbers together and got 110011. if one of the binary numbers is 100110, find the other number?

• 1011

• 1101

• 1111

• 1100

8. 7. In a Numeracy Class, the Math teacher told the pupils to change 87 to binary number. If you were in the class, what will be your answer?

• 1011011

• 1010111

• 1110101

• 1011101

9. 8. If 1111 in base 10 is 15, then what is 10110 in base 10?

• 22

• 24

• 30

• 31

9. 9. Multiplying 10111 by 11 gives _____

• 1011001

• 1001101

• 100101

• 1000101

10. 10. John was looking for a binary number. He found 1101 and 101 being multiplied together to give the binary number. what is the binary number?

• 1100001

• 1010001

• 1000001

• 1000101