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Selections of a few objects
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4-point ladder

Selections of a few objects, 4-point ladder

●●○4 points, difficulty 2 of 34 pt

Two steps, or one step plus a trap.

3 in a row to finish this ladder.

0/3 solved

KA-0074

about 75s

Two students are chosen from a group of six to represent the class. How many different pairs are possible?