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Looks like I'm going first: "What does an African elephant weigh, measured in units of electrons?" I remember from secondary school an electron weighs something times 10^(-28) grams. So let's say 5*10(^-31) kgs. I had no idea how much an African elephant weighs, so let's call it 1500 kilos. Divide one by the other, I got 3*10^(33) And 10^33 was the right answer... That was lucky as hell...