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Q: How can I tell whether a number is odd?

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An even number can be divided by 2 evenly. An odd number will have a remainder of 1 when divided by 2.

You can tell whether a number is even or odd by dividing by two. If the result is an integer, then then number was even.(lol no offence but its kinda easy)

whenever you add an even number the answer will be the same (odd/even) as the other number

You can tell it will be even when the number you are multiplying has a 2 4 6 8. You can tell it will be odd when the number you are multiplying has a 1 3 5 7.

You cannot. If a number is even - other than 2 - then it is a composite number. However, if it is odd, it is not easily possible to tell whether it is prime or composite.

its easy to tell that if the last number ends with 0,2,4,6,8,10,12,14,16,18,20 so on and so on then its even if the answer starts with a 1,3,5,7,9,11,13,15,17,19 so on so on then its an odd number

It is a negative number. The answer is the same whether there is an odd or even number of addends.

It is a negative number. The answer is the same whether there is an odd or even number of addends.

you can tell cause odd numbers have something left over

By counting in multiplication

It is unknown whether an odd perfect number actually exists. If an odd perfect number exists it will be extremely large, that is in excess of 10300.

An even number can be divided by 2 evenly. An odd number will have a remainder of 1 when divided by 2.

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