4th July 2003 at 01:00
Six runners enter a race.

Each of them can run 10 metres per second.

They start from points along a straight line at equal intervals of 30 metres.

The finishing point G is 200 metres from F.

Angle AFG is a right angle.

A starts first, B starts 1 second after A, and C 1 second after B, and so on.

In what order do the runners finish the race?



There are 45 three-digit super numbers:

110; 121 220; 132 231 330; 143 242 341 440; 154 253 352 451 550; 165 264 363 462 561 660; 176 275 374 473 572 671 770; 187 286 385 484 583 682 781 880; 198 297 396 495 594 693 792 892 990


The order of finishing is D, C, E, B, with A and F tying last.

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