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2006 AMC 10B Problem 11

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2006 AMC 10B Problem 11AMC 10 Step by Step
Name:                             Date: September 13, 2026
Modular Arithmetic · difficulty 2 of 5 · about 3 min · position P11-15

What is the tens digit in the sum 7!+8!+9!+...+2006!7!+8!+9!+...+2006!

  1. A)

    11

  2. B)

    33

  3. C)

    44

  4. D)

    66

  5. E)

    99

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