- {52, 104, 208, 312, 416, 624, 728, 832, 936}? Other similar sequences?
- 3 points inside the 3-4-5 triangle: what is the maximal value of minimal distance between these 3 points? Is 25/8 exact or just approximate
- n, n^2, n^3, n^4, n^5, n^6 and n^7 are all distinct digit numbers: {0,1,2,3,4}.
- n, n^2, n^3 and n^4 are all distinct digit numbers: 0, 1, 2, 3, 4, 5, 6, 8, 13, 17, 18, 32.
