IBM Company Numerical Ability Area and Volume

Three containers A, B and C have volumes a, b, and c respectively; and container A is full of water while the other two are empty. If from container A water is poured into container B which becomes 1/3 full, and into container C which becomes 1/2 full, how much water is left in container A?

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IBM Other Question

A wizard named Nepo says "I am only three times my son's age. My father is 40 years more than twice my age. Together the three of us are a mere 1240 years old." How old is Nepo? If x=y=2z and xyz=256 then what is the value of x?

(a)12

(b)8

(c)16

(d)6