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    (2025)2025−(2025)2024(2025)^{2025} - (2025)^{2024}(2025)2025−(2025)2024​ is NOT divisible by
    Question

    (2025)2025(2025)2024(2025)^{2025} - (2025)^{2024}​ is NOT divisible by

    A.

    8

    B.

    13

    C.

    23

    D.

    33

    Correct option is B

    Solution:

    1. Simplify the Expression:

    20252025202520242025^{2025} - 2025^{2024}

    =20252024×(20251)= 2025^{2024} \times (2025 - 1)

    =20252024×2024= 2025^{2024} \times 2024​​​

    2. Factorize 2025 and 2024:

    • 2025 = 3⁴ × 5² (no prime factors other than 3 and 5)

    • 2024 = 2³ × 11 × 23

    3. Check Divisibility:

    • 8 (2³): Present in 2024 → Divisible

    • 13: Not in 2025 or 2024 → Not divisible

    • 23: Present in 2024 → Divisible

    • 33 (3 × 11): 3 is in 2025, 11 is in 2024 → Divisible

    Answer: B (13)is the correct option because 13 does not divide the expression.

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