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A positive integer is a multiple of 27 when it can be divided by 27; this means that its division by 27 gives an integer quotient and zero remainder.
Since 27 is a multiple of 9 and 3, all multiples of 26 are also multiples of 9 and 3.
If an integer is a multiple of 27 the sum of its digits is a multiple of 9 and 3, that number must be divisible by 9 and 3.
Example: 108 is a multiple of 27 'because 108 is divisible by 9 and 3, 108/9=12 and 108/3=36'.
Here are some multiples of 27 greater than 0:
Multiples of 27 less than 1000:
27; 54; 81; 108; 135; 162; 189; 216; 243; 270; 297; 324; 351; 378; 405; 432; 459; 486; 513; 540; 567; 594; 621; 648; 675; 702; 729; 756; 783; 810; 837; 864; 891; 918; 945; 972; 999.

Multiples of 27 up to 1000 and less than 2000:
1026; 1053; 1080; 1107; 1134; 1161; 1188; 1215; 1242; 1269; 1296; 1323; 1350; 1377; 1404; 1431; 1458; 1485; 1512; 1539; 1566; 1593; 1620; 1647; 1674; 1701; 1728; 1755; 1782; 1809; 1836; 1863; 1890; 1917; 1944; 1971; 1998.

Multiples of 27 between 2000 and 3000:
2025; 2052; 2079; 2106; 2133; 2160; 2187; 2214; 2241; 2268; 2295; 2322; 2349; 2376; 2403; 2430; 2457; 2484; 2511; 2538; 2565; 2592; 2619; 2646; 2673; 2700; 2727; 2754; 2781; 2808; 2835; 2862; 2889; 2916; 2943; 2970; 2997.

Is 27 a multiple of 9?
27 is a multiple of 9 because the sum of digits of a multiple of 9 is a multiple of 9, 2+7=9 is a multiple of 9.

What is the least common multiple of 9 and 27?
The least common multiple of 9 and 27 is 27.

What is the least common multiple of 18 and 27?
The least common multiple of 18 and 27 is 54 .