Riddle: Which Number Replaces The Question Mark In The 3rd Triangle

triangle question mark riddle
Here’s the riddle. There’s 3 triangles below. All numbers are given except for the question mark. What number replaces the question mark? triangle question mark riddle
  • Riddle
  • answer

Which number replaces the question mark of the third triangle.  Use clues from the first two triangles to figure out the answer.

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