 
<translate> Idan lambar ƙarshe ita ce 0, 2, 4, 6, ko 8, lambar ta zama ma'ana kuma saboda haka ba ta farko ba ce. Idan lambar ƙarshe ita ce 5, lambar za ta iya raba ta 5 kuma saboda haka ba ta farko ba. Abubuwan da za a iya yi kawai su ne 1, 3, 7 da 9. Saboda haka yiwuwar kusan 1/4 (amsar A). Mun ce kusan saboda akwai wani nau'i na bazuwar a cikin rarraba lambobi na farko. Amsar ƙarshe: (A). <eng> If the last digit is 0, 2, 4, 6, or 8, the number is even and therefore not prime. If the last digit is 5, the number is divisible by 5 and therefore not prime. The only possibilities are 1, 3, 7, and 9. So the probability is approximately 1/4 (answer A). We say approximately because there is a certain degree of randomness in the distribution of prime numbers.
The final answer: (A). 