“how old are you, mr. brown? ” “i’m more than eighty.” “and how many sons have you got? ” “you want to know a lot, don’t you? well, let me tell you this. each of my boys has as many sons as he has brothers, and i’ve got as many sons as grandsons, added together, as i’ve got years in my age.” “thank you very much, mr. brown. that’s all i wanted to know! ” how old was mr. brown? how many sons had he? and how many grandsons? a) 90 years old, 9 sons, 15 grandsons. b) 75 years old, 10 sons, 23 grandsons c) 81 years old, 9 sons, 72 grandsons d) 91 years old, 5 sons, 11 grandsons

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