allery7^25 चा एकक अंक किती आहे?
A1
B3
C7
D9
Answer & Solution
Correct answer: C. 7
7^n चक्राचे एकक अंक: 7, 9, 3, 1, 7, 9, 3, 1... (कालावधी 4).
25 मोड 4 = 1, त्यामुळे युनिट अंक 7^1 = 7 शी जुळतात.
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