whats the least common multiple of 6,15,and 20?
818533
For LCM, keep dividing by common prime factor, starting from 2, throughout till you get 1 in the end.\nInitially 6, 15, 20\nDivide by 2: 3, 15, 10 (You can't divide 15 by 2, hence you leave it as it is.)\nDivide by 2: 3, 15, 5 (Similarly, you can't divide 3 by 2, hence you leave it as it is.)\nDivide by 3: 1, 5, 5\nDivide by 5: 1, 1, 1\nLCM = 2 x 2 x 3 x 5 = 60\n\nHope this helps :)
200692
15,21,25,28,29,5,1,3,99,31
511225
You Should find the greatest common factor of {15 , 25} and then of {r^7 , r} and of {s , s^5} and multiply them into eatchother.\nthe first one is surely 5, the 2nd one is r and the 3rd one is s so the answer is 5rs.
1079568
Find the least common multiple for 4 and 8.  It is 8.\nMultiply everything by 8\n8(10x) - 8(1/4) = 8(9x) + 8(3/8)\n80x - 2 = 72x + 3\nSubtract 72 x from each side\n8x - 2 = 3\nAdd 2 to each side\n8x = 5\nDivide each side by 8\nx = 5/8
511108
Look for "least common multiple" of 8 and 10 and you get 40.  \n\n8*5=40 and 10*4=40 \n\nso m=5 and n=4. \n\n5+4=9, thus m+n=9.\n\nThis is the only solution since it asked for the LEAST positive integers.  Although 10 and 8 would work as well, they would not be the LEAST positive integers, thus NOT a solution! Also decimals are NOT integers, so you can't use decimals in solution.\n\nHope I explained it well...\n\nGood luck.
963450
20 + x = -4x + 15\n5x = -5\nx = -1\n\n5 = 5(x - 1) + 3 - 4x\n5 = 5x - 5 + 3 - 4x\n5 = x - 2\nx = 3\n\n-5 + 6 - 8x = -150\n5 - 6 + 8x = 150\n-1 + 8x = 150\n8x = 149\nx = 149/8
735319
easy 24. \n5 (x3) =15\n6 (x3) = 18\n7 (x3) = 21\n8 (x3) = 24
343152
in order to have a LCM- you must have TWO (2) NUMBERS!\n\nTHE LEAST COMMON MULTIPLE OF 324 AND ??????
780226
lets take the common multiple 210\n15,35,21 and 2 are the factors\nI was thinking of 105 but only 15.35.21 come to my mind
972447
8,6.12,18,10,1,4,21,8,12,7,15
452386
7*6*5*4 = 840 if order matters.\n\n7*6*5*4 / 4! = 35 if order does not matter
572812
The answer is:\n.59^6 + 6*(.59^5)*(.41^1) + 15*(.59^4)*(.41^2)=\n.52359116881\nSo, the correct answer is choice C.
812066
Find the lowest common denominator (LCD).\n\ni.e.  1/2 + 1/3\n\nLCD = 2*3 = 6\n\n(1*3)/(2*3) + (1*2)/(3*2) =\n\n3/6 + 2/6\n\n5/6
635110
For doing squares of numbbers ending with 5, here it is\n\ntake the numbers before 5 and multiply it by its next number and write product followed by 25 e.g.\n65*65 = (6*(6+1)) and 25 = 6*7 and 25 = 4225
798195
Don't be scared by all the words.  You just have to remove brackets and parentheses from\n2[x+(x+10)+(x+2(10))] \n\nand then collect the terms -- you should get 6x+60.\n\nThe last part just means do it again with 15 replacing 10.
1102914
10\nThey are factors of 60 (in order from largest to smallest).
568943
17\n1, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 21,31,41,51,61.