The Highest Common Factor (HCF) of 165, 195, and 285 is the largest number that divides all three numbers evenly. To find the HCF, we first factorize each number: 165 = 3 x 5 x 11, 195 = 3 x 5 x 13, and 285 = 3 x 5 x 19. Then, we identify the common factors among the three numbers, which are 3 and 5. Therefore, the HCF of 165, 195, and 285 is 15 (3 x 5).
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The GCF is 15 so far.
15 30 45 60 75 90 105 120 135 150 165 180 195 210 225 240 255 270 285 300
The factors of 165 are 1, 3, 5, 11, 15, 33, 55, and 165. The factors of 182 are 1, 2, 7, 13, 14, 26, 91, and 182. The highest common factor of 165 and 182 is 1.
There are some multiples of 15 from 15 to 500! Here it is... 15, 30, 45, 60, 75, 90, 105, 120, 135, 150, 165, 180, 195, 210, 225, 240, 255, 270, 285, 300, 315, 330, 345, 360, 375, 390, 405, 420, 435, 450, 465, 480, 495
To have a HCF, you need at least 2 numbers. There is no HCF in just 1 number.