What is the average of 7 consecutive numbers if the smallest number is called n?

What is the average of 7 consecutive numbers if the smallest number is called n?

• First number = n
• Second number = n + 1
• Third number = n + 2
  
• Fourth number = n + 3
  
• Fifth number = n + 4
  
• Sixth number = n + 5
  
• Seventh number = n + 6

Average = Sum of all numbers / Total numbers
Average = (n + n + 1 + n + 2 + n + 3 + n + 4 + n + 5 + n + 6)/7
Average = 7n + 21/7

Factor out a 7 from the top:
7(n + 3)/7

Cancel the 7's:
n + 3