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JAMB Mathematics 1981 Question 28

Question 28

Number Bases

The number 25 when converted from the tens and units base to the binary base (base two) is one of the following

  1. A.10011
  2. B.111011
  3. C.111000
  4. D.11001
  5. E.110011.
Show the answer and explanation

Answer: D (11001)

Explanation

25 = 16 + 8 + 1, so in base two it is 11001.