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Remainders and modular cycles
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5-point ladder

Remainders and modular cycles, 5-point ladder

●●●5 points, difficulty 3 of 35 pt

Needs an idea, not just a procedure.

3 in a row to finish this ladder.

0/3 solved

KA-0037

about 120s

What is the units digit of 7 multiplied by itself 2026 times, that is 7 to the power 2026?