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Q: How do you know if a natural number is divisible by another natural number?

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A number that is divisible by 15 is divisible both by 5 and 3 A number is divisible by 5 if it ends with 0 or 5 A number is divisible by 3 if the sum of its digits is divisible by 3 e.g. 4035 is divisible by 15 as it ends with a 5 and 4+0+3+5=12 which is divisible by 3

The Answer :)If the number is divisible by 2andIf the number is divisible by 3To find out if the number is divisible by 2 you look at the last digit of the number and see if it's an even number...ex: 420 you look at the 0 and 0 is a even number so 420 is divisible by 2.To find out if a number is divisible by 3 you add all the digits together and then see if the sum is divisible by 3...ex: 420 you add 4+2+0= 6 . and 6 is divisible by 3 so the number 420 is divisible by 3.yeah!

Adding the digits together gives 12, which is divisible by 3, so 273 is divisible by 3, and thus not prime.

To know what numbers are prime between 25-50, you'd have to figure out if any number besides 1 and that number itself can go into that number. Another key, is that all even numbers between 25 and 50 are NOT prime numbers. The only even number, that is prime is 2. So you'd have to go through all the odds between 25-50. For example: 27 is divisible by: 1,3,9, and 27 ~composite~ 29 is divisible by 1 and 29 ~prime~ Hope that helps!

I don't know the answer so please would you answer it

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663 is divisible by i dont know . but i do know that it can not be a even number so it has to be divisible by a odd number

No.A number a is divisible by another number b, if and only if the fraction a/b is equivalent to a whole number. And as you know, 1/2 = 0.5, which is not a whole number, hence is 1 not divisible by 2.The only number 1 is divisible by, is 1 itself. All numbers are divisible by 1.

the number will also be divisible by 3 and 2

If a number is even, it's divisible by two.

If a number ends in 5 or 0, that number is divisible by 5.

Divide the number by nineteen. If the answer is a whole number, then the number is divisible.

If the last two digits are divisible by 4, the whole number is divisible by 4.

All numbers are divisible by one.

If the number ends in 0 or 5 it's divisible by 5

If it's even and divisible by 3, it's divisible by 6.

Try dividing the number by 19. If the answer is a whole number (with no remainder), then the number is divisible by 19.

If it ends in a zero, it's divisible by 10.

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