Question 132826
"24 characters were left out" __ 24 more characters than spaces


"short of 25 characters" __ 25 more spaces than characters


let x="number of rows/columns in original grid", so x+1="number in second grid"
__ let y="number of characters"


"24 characters were left out" __ y=x^2+24


"short of 25 characters" __ y+25=(x+1)^2 __ y+25=x^2+2x+1 __ y=x^2+2x-24


substituting __ x^2+24=x^2+2x-24 __ subtracting x^2-24 __ 48=2x __ 24=x


y=(24)^2+24 __ y=600