Well, isn't that a happy little question? Let's find the greatest common factor of 256 and 640. We can start by listing the factors of each number and then finding the largest number they have in common. It looks like the greatest common factor of 256 and 640 is 128. Just like painting, math can be a joyful experience when we break it down into simple steps.
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The highest common factor (HCF) of 256 and 640 is the largest number that divides both 256 and 640 without leaving a remainder. To find the HCF, we need to identify the common factors of both numbers. The factors of 256 are 1, 2, 4, 8, 16, 32, 64, 128, and 256, while the factors of 640 are 1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 80, 160, and 320. The highest common factor of 256 and 640 is 128.
The positive integer factors of 1280 are: 1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 128, 160, 256, 320, 640, 1280
Yes and 640/5 = 128
The factors of 640 are: 1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 128, 160, 320, 640.
Choose a factor pair of 640 and then factor pairs of each resulting number that is not prime until you have reduced 640 to prime numbers.64010 x 642x5 x 8x8_ _ 2x4 2x4_ _ _ 2x2 _ 2x2So, the prime factorization of 640 is 2 x 5 x 2 x 2 x 2 x 2 x 2 x 2, which is 2 x 2 x 2 x 2 x 2 x 2 x 2 x 5 when reordered in numerical order. It can also be written in index form (in other words, using exponents) 27 x 5.