Bill Michell
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 Jan3 comment Does mathematics require axioms? Once again, XKCD is relevantâ€¦ xkcd.com/435 Jun2 answered Is there a great mathematical example for a 12-year-old? Aug31 awarded Yearling Jul4 revised How to show that $0 \times 2 = 0$? edited body Jul4 revised How to show that $0 \times 2 = 0$? added 1 characters in body Jul4 answered How to show that $0 \times 2 = 0$? Jun10 comment Prove that 16, 1156, 111556, 11115556, 1111155556â€¦ are squares. This is quite a nice result, and worth remembering; proving that each number in the sequence is the square of a natural number by 'guessing' what number each is the square of, and proving that this is indeed true for every number in the sequence. Nov27 awarded Critic Sep28 revised How many possible outcomes can there be in the lottery? Make the starting steps a little more explicit. Sep28 comment How many possible outcomes can there be in the lottery? I'm not chris, but I've talked through an answer without actually doing the calculation for you... Sep28 revised How many possible outcomes can there be in the lottery? Minor grammatical improvements. Sep28 answered How many possible outcomes can there be in the lottery? Sep28 awarded Quorum Sep28 awarded Nice Answer Sep27 awarded Suffrage Sep27 comment How many possible outcomes can there be in the lottery? Actually, it isn't clear that you need to divide: the order is "relevent" (I assume this is the same as relevant) Sep27 awarded Citizen Patrol Sep27 revised infinity wiki excerpt added 164 characters in body Sep27 comment In a family with two children, what are the chances, if one of the children is a girl, that both children are girls? So re-order the question - "in a family with two children, at least one of whom is a girl, what are the chances that the other is also a girl?" and the 1 in 3 answer might make a little more sense. Sep27 awarded Tag Editor