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Why is 2019 a prime number?
A prime number has as its only two factors: one and the number. This is not the case for 2019. Just by looking at it an summing up the digits (2+0+1+9 = 12), I know that 2019 is divisible by 3 (so 3 is a factor of 2019), therefore 2019 is not prime.
What are the factors of 2019?
The factors of 2019 are: 1, 3, 673, 2019.
Is 189 divisible by 2 3 4 5 6 9 and 10?
No. 189 is only evenly divisible by 3 and 9 (from the set provided). Using the following rules of divisibility on the number 189: Divisible by 2? No - the number is not even Divisible by 3? Yes - the sum of the digits (1 + 8 + 9 = 18) is divisible by 3 Divisible by 4? No - the last two digits are not evenly divisible by 4 Divisible by 5? No - the last digit is not a 0 or a 5 Divisible by 6? No - the number is not even Divisible by 9? Yes - the sum of the digits is divisible by 9 Divisible by 10? No - the number is not divisible by 2 or 5
What is 730 divisible by?
730 is divisible by 10
Is 166 divisible by 3?
It is not evenly divisible.
