Binary questions

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Across
  1. 3. Binary ______ is used to double or half a binary number.
  2. 4. A base 2 number system
  3. 6. A base 16 number system
  4. 7. ____ shift is used to double binary numbers.
Down
  1. 1. A base 10 number system
  2. 2. These are used to store characters and their binary codes. (2 words - 9, 4)
  3. 5. _____ shift is used to half binary numbers.