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 5 even numbers . his mother immediately worked out the answer . how much had he scored in math ?
"b 30 sum = ( n x n ) + n hence , 5 x 5 = 25 + 5 = 30"
multiply(add(5, const_1), 5)