81, 162, 243, 324, 405, 486, 567, 648, 729, 810,
891, 972, 1053, 1134, 1215, 1296, 1377, 1458, 1539, 1620,
1701, 1782, 1863, 1944, 2025, 2106, 2187, 2268, 2349, 2430,
2511, 2592, 2673, 2754, 2835, 2916, 2997, 3078, 3159, 3240,
3321, 3402, 3483, 3564, 3645, 3726, 3807, 3888, 3969, 4050,
4131, 4212, 4293, 4374, 4455, 4536, 4617, 4698, 4779, 4860,
4941, 5022, 5103, 5184, 5265, 5346, 5427, 5508, 5589, 5670,
5751, 5832, 5913, 5994, 6075, 6156, 6237, 6318, 6399, 6480,
6561, 6642, 6723, 6804, 6885, 6966, 7047, 7128, 7209, 7290,
7371, 7452, 7533, 7614, 7695, 7776, 7857, 7938, 8019, 8100
The first four multiples of 81 are 81, 162, 243, and 324.
81, 162, 243, 324
81162243324405486567648729810991107211531234131513961477155816391720
1, 9, and 81 are the only multiples of 81
There are 11 multiples of 9 up to 100. 9 18 27 36 45 54 63 72 81 90 99
27 54 81 108
They are: 54, 63, 72, 81, 90, 99.
I presume you mean what are all the multiples of 9 up to 100 (and not what are all the multiples of 9, 10, 11, ..., 100 of which there are infinitely many): 9, 18, 27, 36, 45, 54, 63, 72, 81, 90, 99.
27, 54, 81, 108, 135
27, 54, 81, 108, 135
162 243 324 405 486
27, 54, 81, 108 & 135