tim came second in math . when his mother asked him how much he had scored , he answered that he got the sum of the first 7 even numbers . his mother immediately worked out the answer . how much had he scored in math ?
"c 56 sum = ( n x n ) + n hence , 7 x 7 = 49 + 7 = 56"
multiply(add(7, const_1), 7)