#Number System#short trick#All government exams #rrb,Bank, SSC CGL etc#short#shorts

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Sum plus difference divided by 2 is large no. And sum - difference divided by 2 is small number so you get 4.5 and 2.5 for x and y and in ratio it is 9:5.

globalolympiadsacademy
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In case anyone is unable to remember this trick, just divide the numerator and denominator of L.H.S by *y*, cross-multiply and then simply.
You will get the correct answer

kanikgupta
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Par value put karene par to ye ayega 9+5/9-4=14/5 joki 7/2 ke barabar nahi h

pawanvaidh
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Trick bekar hai kab tak Yaad rakhoge, actual calculations hi best hai, I advice everyone.

aadilking
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Wrong answer... the correct answer is 18:10

johnsonjeff