l Sum of the first 15 Even Numbers

Enter n:

Sum of the First
              

Calculate the sum of the following

The first 15 Even Numbers

Σ n Even Numbers formula:

S15 = n(n + 1)

S15 = 15(15 + 1)

S15 = 15(16)

S15 = 240

Average (A) of the first 15 Even Numbers

A  =  Sum of the first 15 Even Numbers
  Count

A  =  240
  15

Average (A) of the first 15 Even Numbers = 16

Sum of the first 15 Even Numbers

  n    En  
  1    2  
  2    4  
  3    6  
  4    8  
  5    10  
  6    12  
  7    14  
  8    16  
  9    18  
  10    20  
  11    22  
  12    24  
  13    26  
  14    28  
  15    30  

Final Answer


S15 = 240
Average (A) of the first 15 Even Numbers = 16