Q: Are the number 3.7.9 and 13 even or odd?

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13 is an odd number and also a prime number

An even number can be divided by 2 evenly. An odd number will have a remainder of 1 when divided by 2. 13 is an odd number.

To add to 13 with 2 even and 1 odd number, can do 1+4+8=13

Lets find out.2 + 3 = 5 (Odd)4 + 7 = 11 (Odd)12 + 13 = 25 (Odd)So it appears that the sum of an even and odd number is an odd number.

Count how many of the numbers are odd. If an odd number of them are odd, then their sum is odd. If an even number of them are odd, then their sum is even.

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13 is an odd number and also a prime number

An even number can be divided by 2 evenly. An odd number will have a remainder of 1 when divided by 2. 13 is an odd number.

No. 13 is an odd number.

To add to 13 with 2 even and 1 odd number, can do 1+4+8=13

Correct.

Lets find out.2 + 3 = 5 (Odd)4 + 7 = 11 (Odd)12 + 13 = 25 (Odd)So it appears that the sum of an even and odd number is an odd number.

Count how many of the numbers are odd. If an odd number of them are odd, then their sum is odd. If an even number of them are odd, then their sum is even.

Yes for example 26/2 = 13 which is an odd number

If the number (count) of odd values to sum is odd, then the answer is odd.If the number (count) of odd values to sum is even, then the answer is even.

Go through each of the numbers, and count how many of them are odd. If you count an odd number of them, then their sum is odd. If you count an even number of them, then their sum is even.

Composite numbers can have either an odd number or an even number of fractions. Factors of 25 are 1, 5, 25 . (odd number of them) Factors of 26 are 1, 2, 13, and 26 . (even number of them)

13 is an odd number. Anything that cannot be evenly divided by 2 is an odd number. The number 13 also happens to be the sixth prime number which also makes it odd (strange in this case). The first few primes are 1, 3, 5, 7, 11, 13, 17, 23, 29, etc. These number have the strange property of of not being divisible by any whole number except 1 and itself. This also means that every prime number will also be odd.