The numbers that are divisible by 57 are infinite. The first four are: 57, 114, 171, 228 . . .
57 is divisible by the prime numbers of 3 and 19
57 of them.
5,19, 29, 61, 41, 127 10 is divisible by 2 so not prime 49 is divisible by 7 57 is divisible by 3
285 is divisible by these numbers: 1, 3, 5, 15, 19, 57, 95, 285.
400 / 7 = 57, so there are 57 multiples of 7 under 400.
57 divided by 3 is 19. (Any number in which all the digits add up to equal a number divisible by 3 is divisible by 3. 5+7=12 which is divisible by 3.) And since 57 is divisible by more numbers than just 1 and itself it is a composite number.
400/7 = 57.1 (approx) so there are 57 numbers.400/7 = 57.1 (approx) so there are 57 numbers.400/7 = 57.1 (approx) so there are 57 numbers.400/7 = 57.1 (approx) so there are 57 numbers.
57, ranging from 7 to 399.
57 = 3 x 19 so 57 is divisible by 1, 3, 19 and 57.
You can see quickly that the number 57 is divisible by 3: 3 * 20 = 60 so if we remove one of those 3's then 3 * 19 = 57 so it is divisible by at least 3 and 19 (as well as itself and 1) Because it is divisible by numbers other than itself and one, 57 cannot be prime. You can also check to see if a number is divisible by 3 by adding its digits and checking to see if that number is divisible by 3: 5+7 = 12 ; and 12 is divisible by 3, so 57 is as well.
1, 3, 19, 57, 479, 1437, 9101, 27303