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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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