11.13.16.19.31.36.39.61.63.69.91.93.96.99.33.66哪些是素数?哪些是合数?哪些是偶数?哪些是奇数?那些有公因数2?
素数:11.13..19.31..61..91.
合数:36.39..63.69..93.96.99.33.66
偶数16..36..96..66
有公因数2:.16.36..96.99..66