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Author: Tinku Tara

prove-that-10-divides-11-10-1-

Question Number 8359 by Nayon last updated on 09/Oct/16 $${prove}\:{that}\: \\ $$$$\mathrm{10}\:{divides}\:\mathrm{11}^{\mathrm{10}} −\mathrm{1} \\ $$ Commented by Rasheed Soomro last updated on 09/Oct/16 $$\mathrm{Actually}\:\mathrm{10}\:\mathrm{divides}\:\:\mathrm{11}^{\mathrm{n}} −\mathrm{1}\:\mathrm{for}\:\mathrm{n}\geqslant\mathrm{0}…

240-2-14319-

Question Number 8353 by Nayon last updated on 09/Oct/16 $$\sqrt{\mathrm{240}+\mathrm{2}\sqrt{\mathrm{14319}}}=? \\ $$ Answered by ridwan balatif last updated on 09/Oct/16 $$\sqrt{\left(\mathrm{111}+\mathrm{129}\right)+\mathrm{2}\sqrt{\mathrm{111}.\mathrm{129}}},\:\mathrm{remember}\::\sqrt{\left({a}+{b}\right)+\mathrm{2}\sqrt{{ab}}}=\sqrt{{a}}+\sqrt{{b}} \\ $$$$\sqrt{\mathrm{111}}+\sqrt{\mathrm{129}} \\ $$$$\mathrm{by}\:\mathrm{using}\:\mathrm{kalkulator},\:\mathrm{i}\:\mathrm{get}…