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A Prime number has only 2 factors: 1 and itself. 385 has a 5 in the ones place, so 5 is also a factor. Since 5 X 77 = 385, 77 is a factor, too. There might be other factors.
385 is a composite number because it has more factors than 1 and itself.
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What is the smallest prime factor of 385?
5 x 7 x 11 = 385
How do you write 385 as a product of its prime factors?
5 x 7 x 11 = 385
What is a factor tree for 385?
As a product of its prime factors: 3*5*5*5 = 375
How do you work out the hcf of 210 and 385?
Prime factors of 210 are: 2, 3, 5 and 7 Prime factors of 385 are: 5,7 and 11 Common factors are: 5 and 7 and so 5*7 = 35 which is the hcf
What number does 11 and 35 go into?
385, 770, 1155, 1540, 1925, 2310 +385 . . .
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