It's the sum of three squares: 40 2 +20 2 +5 2 =2025 4. It's the sum of the cubes of numbers from 1 to 9: 1 3 +2 3 +3 3 +4 3 +5 3 +6 3 +7 3 +8 3 +9 3 =2025 5. The sum of the first 45 odd numbers i ...

Said the second: “No, Hardy! No . . . It is the smallest, number expressible as the sum of two cubes in two different ways.”This and many other anecdotes and insights bring to life the great ...