WAEC Mathematics 2004 Question 2

Question 2

Number Bases

If y = 23five + 101three, find y, leaving your answer in base two

  1. A.1110
  2. B.10111
  3. C.11101
  4. D.111100
Show the answer and explanation

Answer: B (10111)

Explanation

23five = 13 and 101three = 10, so y = 23 = 16 + 4 + 2 + 1 = 10111two.