यदि 721 + 722 + 723 + 724 को 25 से विभाजित – InterviewSolution

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1.	यदि 721 + 722 + 723 + 724 को 25 से विभाजित किया जाता\| है, तो शेष क्या बचेगा ?(A) 77(B) 17\| (C) 5(D) 0 ।
Answer» 7^21(1+7+49+343)/25=7^21×400/25; whatever the value of 7^21 be, multiplying it by 400, remainder =0

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