They made a mistake. They carried the 1 while forgetting to add the 6 when dividing the sum by 7. That makes the 8 undivisable by the 16 going into the 71. Any 4th grader could have caught that.
They made a mistake. They carried the 1 while forgetting to add the 6 when dividing the sum by 7. That makes the 8 undivisable by the 16 going into the 71. Any 4th grader could have caught that.