Amazing Race Crossoword

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Across
  1. 4. What's the name of the dino in Dr. Kokan's room?
  2. 5. What's the term for a function that is its own derivative?
  3. 7. How many kids does Dr. Kokan have?
  4. 8. There is an odd number, but if you take away an alphabet from it, it becomes even. What is it?
Down
  1. 1. When my dad was 31 years old, I was just 8 years. Now his age is twice as old as my age. What is my present age?
  2. 2. When my dad was 31 years old, I was just 8 years. Now his age is twice as old as my age. What is my present age?
  3. 3. Def- The rate of change of a function with respect to variable.
  4. 6. What's a mathematician's favorite dessert?