求能被3整除且至少有一位数字为5的三位数的个数答:105 ,135 ,153 ,156 , 159 ,165 .195 , 225 ,252 , 255 ,258 ,285 ,315 345 ,351 ,354 , 357 ,375 ,405 ,435 ,450 ,453 ,456 , 459 ,465 ,495 ,501 ,504 ,507 , 510 ,513 ,516 ,519 ,522 ,525 ,528 ,531 ,534 ,537 , 540 ,543 , 546 , 549 ,552 ,...