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Author: Tinku Tara

If-the-sum-of-the-coefficients-in-the-expansion-of-a-b-n-is-4096-then-the-greatest-coefficient-in-the-expansion-is-

Question Number 9421 by 8168 last updated on 07/Dec/16 $$\mathrm{If}\:\mathrm{the}\:\mathrm{sum}\:\mathrm{of}\:\mathrm{the}\:\mathrm{coefficients}\:\mathrm{in}\:\mathrm{the} \\ $$$$\mathrm{expansion}\:\mathrm{of}\:\left({a}+{b}\right)^{{n}} \:\mathrm{is}\:\mathrm{4096},\:\mathrm{then}\:\mathrm{the} \\ $$$$\mathrm{greatest}\:\mathrm{coefficient}\:\mathrm{in}\:\mathrm{the}\:\mathrm{expansion}\:\mathrm{is} \\ $$ Answered by sandy_suhendra last updated on 08/Dec/16 $$\mathrm{if}\:\mathrm{the}\:\mathrm{sum}\:\mathrm{of}\:\mathrm{coefficients}\:=\:\mathrm{4096}\:…

If-sin-A-sin-B-a-and-cos-A-cos-B-b-then-cos-A-B-

Question Number 9218 by nazar last updated on 23/Nov/16 $$\mathrm{If}\:\mathrm{sin}\:{A}+\mathrm{sin}\:{B}={a}\:\mathrm{and}\:\mathrm{cos}\:{A}+\mathrm{cos}\:{B}={b}, \\ $$$$\mathrm{then}\:\mathrm{cos}\:\left({A}+{B}\right)= \\ $$ Commented by sandy_suhendra last updated on 24/Nov/16 $$\mathrm{cos}\left(\mathrm{A}+\mathrm{B}\right)\:\mathrm{or}\:\mathrm{cos}\left(\mathrm{A}−\mathrm{B}\right)\:? \\ $$ Terms…

How-much-money-will-A-gets-when-Rs-2430-is-divided-among-A-B-and-C-such-that-if-their-shares-be-diminished-by-Rs-5-Rs-10-Rs-15-respectively-the-remainders-shall-be-in-the-ratio-3-4-5

Question Number 9212 by nazar last updated on 23/Nov/16 $$\mathrm{How}\:\mathrm{much}\:\mathrm{money}\:\mathrm{will}\:\mathrm{A}\:\mathrm{gets}\:\mathrm{when}\: \\ $$$$\:\mathrm{Rs}.\:\mathrm{2430}\:\mathrm{is}\:\:\mathrm{divided}\:\:\mathrm{among}\: \\ $$$$\mathrm{A},\:\mathrm{B}\:\mathrm{and}\:\mathrm{C}\:\mathrm{such}\:\mathrm{that}\:\mathrm{if}\:\mathrm{their}\:\mathrm{shares}\:\mathrm{be} \\ $$$$\mathrm{diminished}\:\mathrm{by}\:\mathrm{Rs}.\:\mathrm{5},\:\mathrm{Rs}.\:\mathrm{10},\:\mathrm{Rs}.\:\mathrm{15}\: \\ $$$$\mathrm{respectively},\:\mathrm{the}\:\mathrm{remainders}\:\mathrm{shall}\:\mathrm{be} \\ $$$$\mathrm{in}\:\mathrm{the}\:\mathrm{ratio}\:\mathrm{3}\::\:\mathrm{4}\::\:\mathrm{5}. \\ $$ Answered by mrW…

The-present-age-of-a-father-and-that-of-his-son-are-in-the-ratio-7-1-After-4-years-the-ratio-will-be-4-1-What-is-the-son-s-present-age-in-years-

Question Number 9172 by nazar last updated on 22/Nov/16 $$\mathrm{The}\:\mathrm{present}\:\mathrm{age}\:\mathrm{of}\:\mathrm{a}\:\mathrm{father}\:\mathrm{and}\:\mathrm{that} \\ $$$$\mathrm{of}\:\mathrm{his}\:\mathrm{son}\:\mathrm{are}\:\mathrm{in}\:\mathrm{the}\:\mathrm{ratio}\:\mathrm{7}\::\:\mathrm{1}.\:\mathrm{After} \\ $$$$\mathrm{4}\:\mathrm{years},\:\mathrm{the}\:\mathrm{ratio}\:\mathrm{will}\:\mathrm{be}\:\mathrm{4}\::\:\mathrm{1}.\:\mathrm{What} \\ $$$$\mathrm{is}\:\mathrm{the}\:\mathrm{son}'\mathrm{s}\:\mathrm{present}\:\mathrm{age}\:\left(\mathrm{in}\:\mathrm{years}\right)\:? \\ $$ Commented by tawakalitu last updated on 22/Nov/16…

In-a-cricket-team-of-11-there-7-were-atleast-20-years-old-and-8-were-atmost-30-years-old-The-ages-of-how-many-were-from-20-years-to-30-years-both-inclusive-

Question Number 9171 by nazar last updated on 21/Nov/16 $$\mathrm{In}\:\mathrm{a}\:\mathrm{cricket}\:\mathrm{team}\:\mathrm{of}\:\mathrm{11},\:\:\mathrm{there}\:\mathrm{7}\:\mathrm{were} \\ $$$$\mathrm{atleast}\:\mathrm{20}\:\mathrm{years}\:\mathrm{old}\:\mathrm{and}\:\mathrm{8}\:\mathrm{were}\:\mathrm{atmost} \\ $$$$\mathrm{30}\:\mathrm{years}\:\mathrm{old}.\:\mathrm{The}\:\mathrm{ages}\:\mathrm{of}\:\mathrm{how}\:\mathrm{many} \\ $$$$\mathrm{were}\:\mathrm{from}\:\mathrm{20}\:\mathrm{years}\:\mathrm{to}\:\mathrm{30}\:\mathrm{years}\left(\mathrm{both}\right. \\ $$$$\left.\mathrm{inclusive}\right)? \\ $$ Answered by mrW last updated…

If-all-the-sides-of-a-hexagon-is-increased-by-2-Find-the-increase-in-its-area-

Question Number 9168 by nazar last updated on 21/Nov/16 $$\mathrm{If}\:\mathrm{all}\:\mathrm{the}\:\mathrm{sides}\:\mathrm{of}\:\mathrm{a}\:\mathrm{hexagon}\:\mathrm{is}\:\mathrm{increased} \\ $$$$\mathrm{by}\:\mathrm{2\%}.\:\mathrm{Find}\:\mathrm{the}\:\%\:\mathrm{increase}\:\mathrm{in}\:\mathrm{its}\:\mathrm{area}. \\ $$ Answered by mrW last updated on 22/Nov/16 $$\mathrm{1}.\mathrm{02}^{\mathrm{2}} =\mathrm{1}.\mathrm{0404}=\mathrm{104}.\mathrm{04\%} \\ $$$$\mathrm{i}.\mathrm{e}.\:\mathrm{its}\:\mathrm{area}\:\mathrm{increases}\:\mathrm{by}\:\mathrm{4}.\mathrm{04\%}.…

A-can-do-a-work-in-10-days-and-B-can-do-the-same-work-in-15-days-How-many-days-will-they-take-if-both-work-together-

Question Number 9167 by nazar last updated on 21/Nov/16 $$\mathrm{A}\:\mathrm{can}\:\mathrm{do}\:\mathrm{a}\:\mathrm{work}\:\mathrm{in}\:\mathrm{10}\:\mathrm{days}\:\mathrm{and}\:\mathrm{B}\:\mathrm{can} \\ $$$$\mathrm{do}\:\mathrm{the}\:\mathrm{same}\:\mathrm{work}\:\mathrm{in}\:\mathrm{15}\:\mathrm{days}.\:\mathrm{How}\: \\ $$$$\mathrm{many}\:\mathrm{days}\:\mathrm{will}\:\mathrm{they}\:\mathrm{take}\:\mathrm{if}\:\:\mathrm{both}\:\mathrm{work} \\ $$$$\mathrm{together}? \\ $$ Commented by tawakalitu last updated on 22/Nov/16…