Halliburton Interview Question: Brain Teaser: Swap two numbers without using a temporary third variable.

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Halliburton

Brain Teaser: Swap two numbers without using a temporary third variable.

Anonymous

22 Oct 2013

a = a+ b b = a - b a = a-b

Anonymous

21 Oct 2012

I provided a solution involving using multiplication/division to store the information about both numbers in a single variable

Anonymous

6 Nov 2012

Example: A=5, B=7 B=B*A^2=7*25 A=B/(A^2)=7*25/25=7 B=sqrt(B/A)=sqrt(7*25/7)=5