TCS Company Numerical Ability Geometry

A village milkman carries out adulteration of milk with water to make higher profits.He has 2 cans one with water and another with pure milk.He pours from can 1 to can 2 sufficient to double its contents and the repour from 2 to 1 enough of the mixture to double the contents.He again repours from 1 to 2 to double the contents of No.2.Finally both cans had equal amount of milk although water is onelitre more than milk in can No.2.Then howmuch more water than milk is there in can 1?

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TCS Other Question
Five college students met at a party and exchanged gossips. Uma said, Only one of us is lying. David said, Exactly two of us are lying. Thara said, Exactly 3 of us are lying. Querishi said, Exactly 4 of us are lying. Chitra said All of us are lying. Which one was telling the truth ?
option
a) David
b) Querishi
c) Chitra
d) Thara The value of diamond varies directly as the square of its weight.if a diamond falls and breaks into two pieces with weights in the ratio 2:3what is the loss percentage in the value