Brother and sister are 30 years old. How old are the brothers and sisters? There are several situations. What is the age difference between brother and sister?

Maybe both brothers and sisters are 15 years old, but the elder brother is several days or months older than the younger sister, or maybe the elder brother is 16 and the younger sister is 14, with a difference of two years. Brother 17 and sister 13, with a difference of 4 years; Brother 18, sister 12, with a difference of 6 years; Brother 19, sister 1 1, with a difference of 8 years; Brother 20, sister 10, age difference 10; Brother 2 1, sister 9, difference 12 years, brother 22, sister 8, difference 14 years; Brother 23, sister 7, 16 years old; Brother 24, sister 6, 18 years old; Brother 25, sister 5, the difference is 20 years old; Brother 26, sister 4, 22 years old; Brother 27, sister 3, 24 years old; Brother 28, sister 2, difference of 26 years, brother 29, sister 1, difference of 28 years, brother 30, sister just born, difference of 30 years.