which of the numbers 5,30,21,37 are composite?
535480
30: 3*2*5\n21: 7*3\n\nThe End
906355
35-55\n\n13-30\n\n12-28\n\n25-22\n\n32-5
452695
45*30+30*20+20*45= 5700
182722
The factors of 9 are 1, 3 and 9.  The factors of 25 are 1, 5, and 25.  The factors of 49 are 1, 7, and 49.  The only common factor is 1.
881190
Well, these numbers are each broken down in prime facorization like this:\n\n3: 3   (prime number)\n7: 7   (prime number)\n5: 5   (prime number)\n4: 2*2 (composite number)\n\nThe greatest amount of times 2 appears is twice. \nThree is once.\nFive once.\nSeven once.\n\nSo, 2*2*3*5*7= 420. You can check it on a calculator. \n(Above can also be written as: 2^2*3*5*7)
605278
72201,02,03,04,05,06,07,09,10,11,12,14,15,16,17,19,21,22,23,25,27,31,60,95\n\n72213,14,15,16,17,18,19,20,24,90,98,99
869678
1 and 1\n9 and 3\n25 and 5\n49 and 7\n81 and 9\n121 and 11\n...
908181
Yes, 31/30 is an improper fraction which can be changed to 1 and 1/30. You then add 1 1/30 to 56 for a total of 57 and 1/30. :)
957103
9 = 3*3, and 21 = 3*7, so common multiples must have at least two factors of 3, and one factor of 7; ie they must be a multiple of 3*3*7 = 63. Theres only one - 63.\n\nOr you could just list multiples of 21: 21,42,63,84. Only one is a multiple of 9.
200692
15,21,25,28,29,5,1,3,99,31
527322
1+1-21+30-5\n2-21+30-5\n-19+30-5\n11-5\n6
617570
36,32,30,28,26,24\n\nnOW IF YOU WIN CAN I HAVE 10 PTS LOL
1050937
go with #2 ... 253 is not prime (253 / 11 = 23)
231634
well i am trying to find out myself\n\n31, 37, 41, 43, 47, 53, 59, 61, 67, 71, 73, 79, 83, 89, 97.\n\nthat makes 15\n\n2, 3, 5, 7, 11, 13, 17, 19, 23, 29.\n\nthats 10\n\nU have all 25 prime less than 100 !\n\nAlways remember 1 is not a prime number ! cuz its divisible only by 1 and not any other number. and prime number requires divisibility by 1 and the number itself. i hope u got everything !\n\nmodified....i messed up somewhat. i wrote 65 and forgot 71. its clear now im sure watever i've writeen is 100% correct.
1160615
(5 divided by 5) plus 5 (times 5)=(1+5)X5=30
455486
20 (9,19,29,39,49,59,69,79,89,90,91,92,93,94,95,96,97,98,99)
1051900
1 2 3 4 5 6 10 12 15 20 30 60\n-1 -2 -3 -4 -5 -6 -10 -12 -15 -20 -30 -60