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Previously asked mathematics question solved


More related GK Questions added to comments,

Previously asked maths questions from numbers for competitive exams


This type of questions often seen in competitive exams, try it...


1. Difference of 2 number is 11 and their product is 60, find the sum of numbers  ?

If you try to solve this question without using equation, it will consume too much time.. so use this equation..


(X + Y)2 = (X - Y)2 + 4 XY


We have     X-Y = 11  and  XY = 60 

hence

(X + Y)2 = 112 + 4 x 60

(X + Y)2 = 121 + 240

(X + Y)2 =  361

X + Y = 19


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