Number systems worksheet with answers

Free printable Number systems worksheet: 6 problems from easy to exam level, with an answer key. Print it or save it as a PDF.

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1.Easy
click the bits to set them012806403201608040201

Set the bits so the 8-bit register holds 0x6D. What is the pattern's value N in decimal?

0x6D
N =
2.Easy
place valuesC256716D1

Convert the hexadecimal number 0xC7D to decimal. Find N.

0xC7DA = 10 … F = 15
N =
3.Medium
8-bit two's complement0−12806403201608040201

Set the bits so they store −22 in 8-bit two's complement. Read as an unsigned number, what is the pattern's value U?

N = −228 bit
U =
4.Medium
8-bit two's complement0−12806403201608040201

Set the bits so they store −16 in 8-bit two's complement. Read as an unsigned number, what is the pattern's value U?

N = −168 bit
U =
5.Hard
click the bits to set them012806403201608040201

Set the bits to the 8-bit result of 1101 1100 AND 1100 1100. What is the result's value R in decimal?

1101 1100AND1100 1100
R =
6.Hard
click the bits to set them012806403201608040201

Set the bits to the 8-bit result of 1111 0101 << 1. What is the result's value R in decimal?

1111 0101<< 1
R =

Answer key

  1. 1. N = 109
  2. 2. N = 3197
  3. 3. U = 234
  4. 4. U = 240
  5. 5. R = 204
  6. 6. R = 234

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