 <translate> Ajụjụ bụ: Lucy tụfuru otu ụzọ n'ụzọ atọ nke ego ya. Mgbe ahụ, o jiri otu ụzọ n'ụzọ anọ nke ego fọdụrụnụ mee ihe, ọ bụkwa nanị dollar 15 ka o ji laa. Ego ole ka Lucy nwere ná mmalite? Nzọụkwụ site na nzọụkwụ: $15 ahụ bụ 1 - 1 / 4 = 3 / 4 nke ego fọdụrụnụ. Ebe ọ bụ na 3 / 4 bụ $ 15, mgbe ahụ 1 / 4 bụ $ 15 / 3 = $ 5. Ya mere, Lucy nwere $5 x 4 = $20 fọdụrụ mgbe o tufuru 1 / 3 nke ego ya. N'ihi ya, $20 bụ 1 - 1 / 3 = 2 / 3 nke ego Lucy nwere ná mmalite. Ebe ọ bụ na 2 / 3 bụ $ 20, mgbe ahụ 1 / 3 bụ $ 20 / 2 = $ 10. Ya mere, Lucy nwere $10 x 3 = $30 na mbido. <hau> Tambayar ita ce: Lucy ta rasa kashi ɗaya bisa uku na kuɗinta. Sai ta kashe kashi ɗaya cikin huɗu na abin da ya rage, kuma ta tafi da dala 15 kawai. Da farko nawa ne kuɗin da Lucy take da shi? Tsarin tunani mataki-mataki: $ 15 shine 1 - 1 / 4 = 3 / 4 na kuɗin da ya rage. Tun da 3 / 4 daidai yake da $ 15, to 1 / 4 daidai yake da $ 15 / 3 = $ 5. Don haka Lucy tana da $ 5 x 4 = $ 20 da suka rage bayan ta rasa 1 / 3 na kudinta. Saboda haka, $20 ita ce 1 - 1 / 3 = 2 / 3 na kuɗin da Lucy ke da shi a farko. Tun da 2 / 3 daidai yake da $ 20, to 1 / 3 daidai yake da $ 20 / 2 = $ 10. Saboda haka, Lucy yana da $10 x 3 = $30 a farkon. 