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What numbers can be divided by 3?
The divisibility rule for 3 is as follows: If the sum of the digits of a number is divisible by 3 then the number is divisible by 3. For example, the number 21 is divisible by 3 since 2+1=3, and 3 is divisible by 3. The number 49 is not divisible by 3 since 4+9=13, and 13 is not divisible by 3.
Which number is prime out of 91 51 31 21?
21 is divisible by 3 and 7, so it is composite. 91 is divisible by 7 and 13, so it is composite. 51 is divisible by 3 and 17. 31 is divisible by only 1 and itself, so it is the prime number.
What is 13 divisible by?
13 is prime. It is divisible by 1 and 13.
What is the divisible of 21?
The numeral '21' is evenly divisible by 21, 7, 3, and 1.
What number is divisible by 13?
13 and all its multiples are divisible by 13.
Is 306 divisible by 13?
306 is not divisible by 13.
What is divisible by 105 and 21?
They're both divisible by 1,3,7, and 21.
What is 819 divisible by?
3, 7, 9, 13, 21, 39, 63, 91, 117, 273.
What is divisible in 21 and 37?
There is nothing that is divisible in 37 and 21. Because 37 is a prime number. However, 21 is divisible by 3 and 7.
When is a number divisible by 13?
A number is divisible by 13 if it is a multiple of 13. In other words, 13 times a number results in a big number that is divisible by 13.
What is a number that is not divisible by 2?
7 11 17 13 15 21 23 27 and so forth
Why is 21 divisible by 1 21 3 and 7?
Because 21 is a multiple of 1, 3, 7 and 21.
