In the Fibonacci sequence, 1, 1, 2, 3, 5, ......, each term after the second is the sum of the previous two terms. How many of the first 100 terms of the Fibonacci sequence are odd?

• every third term is an even term.
  this can be understood by seeing the fact that;
  odd + odd = even
  
  even + odd = odd
  
  odd + even=odd
  
  So correct answer is [100/3]= 33 where [ ] is greatest integer function
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