Sum that requires no adding
Number Theory
Level
2
Consider the table:
\[\begin{array} {c} 1=1 \\ 3+5= 8 \\ 7+9+11= 27 \\ 13+15+17+19= 64 \end{array} \]
What is the sum of the numbers in the tenth row ( that should be indicated on the right hand side)?
by
Hana Nakkache