Sequence and series

Question

The value of n(sigma)i=1 i(Sigma)j=1 j(Sigma)k=1 =220, then the value of n is 

 

(*Sigma here is the summation sign) 

The options are 

11,12,10,9

Answer 1

Sam, your question is unclear. Could you perhaps give a better description?  I make it out as:

 

n         i          j

Σ         Σ         Σ = 220

i=1      j=1      k=1

 

Are all of these sums equal to each other?  What is the function being summed?