Cannonball problem
Cannonball problem
Mathematical problem of square numbers which are also square-pyramidal.
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Readers' pathsAug 2026 – Oct 2026
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Close-packing of equal spheres
Dense arrangement of congruent spheres in an infinite, regular arrangement.
19%
Square pyramidal number
Number of stacked spheres in a pyramid.
15%
Square triangular number
Integer that is both a perfect square and a triangular number.
13%
Squaring the square
Mathematical problem.
12%
Diophantine equation
Polynomial equation whose integer solutions are sought.
6.3%
Readers come from
Share of the 492 readers arriving from another article
70 (number)
Natural number.
24%
Close-packing of equal spheres
Dense arrangement of congruent spheres in an infinite, regular arrangement.
18%
Diophantine equation
Polynomial equation whose integer solutions are sought.
15%
24 (number)
Natural number.
13%
Square triangular number
Integer that is both a perfect square and a triangular number.
11%
Édouard Lucas
French mathematician (1842–1891).
8.9%
Square pyramidal number
Number of stacked spheres in a pyramid.
2%