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Ask iit jee aieee pet cbse icse state board community Discussion Response Post to: doubt in binomial theorem
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akhil_o (2709)

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Olaaa!! Perrrfect answer. 435  [702 rates]

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71 when divided by 25 gives rem=7
72 when divided by 25 gives rem=24(49)
73 when divided by 25 gives rem=18(343)
74 when divided by 25 gives rem=1(2401)
75gives r=7 again

103 is of the form 4k+3
hence it gives rem=18

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