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3 3 8 first, find all combination to get 72. next add up the numbers. you will find two combinations that equals the same, hence sophie said that's not enough information. next peirre said he has one oldest daughter so of the two combos, only 3 3 8 correct. although technically, twins aren't...

Hints: 1. (m1)(v1)=(m2)(v2) so mass of rocket x velocity of rocket = mass of gas x velocity of gas. if you want to keep the velocity of rocket and mass of gas constant, what would happen to the velocity of gas if the mass of rocket increased from the equation? in other words, mass rocket x...