Here they are:
45
90
135
180
225
270
315
360
405
450
495
540
585
630
675
720
764
810
855
900
945
990
There are 200 of them. Starting with 45*23 = 1035 and all the multiples of 45 up to 45*222 = 9990.
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.
All multiples of 3 have digits that add up to a multiple of 3. There are 333 multiples of 3 between 1 and 1000.
All the multiples of 5 between 1 and 51 are: 5, 10, 15, 20, 25, 30, 35, 40, 45, 50 These add up to 275.
All multiples of 3 have digits that add up to a multiple of 3. There are 333 multiples of 3 between 1 and 1000.
Oh honey, multiples of 25 up to 1000? That's easy peasy lemon squeezy. You've got 25, 50, 75, 100, all the way up to 1000. Just keep adding 25 each time and you'll be counting those multiples like a pro.
All of its multiples from 3 to 999
All multiples of 12, such as 120, 600, 660.
Oh, dude, multiples of 4 are like those friends who always show up at your party. They just keep coming. So, to find out how many multiples of 4 are up to 1000, you just divide 1000 by 4, which gives you 250. So, there are 250 multiples of 4 up to 1000. It's like a never-ending party!
15, 30, 45, 60, 75, 90
There are 200 of them. Starting with 45*23 = 1035 and all the multiples of 45 up to 45*222 = 9990.
45 and 18
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.
All multiples of 3 have digits that add up to a multiple of 3. There are 333 multiples of 3 between 1 and 1000.
48121620242832364044485256606468727680848892961001041081121161201241281321361401441481521561601641681721761801841881921962002042082122162202242282322362402442482522562602642682722762802842882922963003043083123163203243283323363403443483523563603643683723763803843883923964004044084124164204244284324364404444484524564604644684724764804844884924965005045085125165205245285325365405445485525565605645685725765805845885925966006046086126166206246286326366406446486526566606646686726766806846886926967007047087127167207247287327367407447487527567607647687727767807847887927968008048088128168208248288328368408448488528568608648688728768808848888928969009049089129169209249289329369409449489529569609649689729769809849889929961000If you simply count by "fours", you'll have them all. Thus you start 4, 8, 12, 16 and end with 988, 992, 996, 1000.
15, 30, and 45 .
All the multiples of 5 between 1 and 51 are: 5, 10, 15, 20, 25, 30, 35, 40, 45, 50 These add up to 275.