The LCM (Least Common Multiple) of 90 and 210 is the smallest number that has both 90 and 210 as factors. The LCM of 90 and 210 is 630 (2 x 32 x 5 x 7), which is the multiple of the highest power of prime factors from both numbers (2 x 32 x 5 = 90 and 2 x 3 x 5 x 7 = 210)
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210 x 0.9 = 189 Therefore, 90 percent of 210 is equal to 189.
The smallest number with exactly 36 factors is 1260. The factors are: 1, 2, 3, 4, 5, 6, 7, 9, 10, 12, 14, 15, 18, 20, 21, 28, 30, 35, 36, 42, 45, 60, 63, 70, 84, 90, 105, 126, 140, 180, 210, 252, 315, 420, 630, and 1260.
It is 90.
90
The LCM of 15 and 18 is 90