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प्रश्न
If n2 = 12345678987654321, what is n?
विकल्प
12344321
1235789
111111111
11111111
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उत्तर
111111111
Explanation:
(11)2 = 121, (111)2 = 12321
(111111111)2 = 12345678987654321
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