WAEC Mathematics 1993 Question 4

Question 4

Number Bases

Convert 89ten to a number in base two.

  1. A.1101001
  2. B.1011001
  3. C.1001101
  4. D.101101
  5. E.11001
Show the answer and explanation

Answer: B (1011001)

Explanation

89 = 64 + 16 + 8 + 1 = 26 + 24 + 23 + 20, which is 1011001 in base two.