Q: Is 21 be a even or odd number?

Write your answer...

Submit

Still have questions?

Continue Learning about Math & Arithmetic

21 is an odd composite number

an odd number

21+9=20

5+5+5+5+1 That is only 5 numbers being added. There can be no answer for six numbers for the following reasons: The numbers are all odd. Two odd numbers make an even number. Two even numbers make an even number. 21 is odd. Take 6 odd numbers and add them up in pairs. Each pair of odd numbers gives an even number so there are 3 even numbers. Even + Even + Even = Even. So sum of any six odd numbers is even but 21 is not even.

Nor do you, apparently. An even number is a number divisible by 2 - that is, if you do integer division, there will be no remainder; if you do the division with a calculator, you don't get anything after the decimal point. Even numbers end with 0, 2, 4, 6, or 8. Odd numbers end with 1, 3, 5, 7, or 9.

Related questions

21 is an odd composite number

An even number can be divided by 2 evenly. An odd number will have a remainder of 1 when divided by 2. 21 is an odd number.

an odd number

The number 21 is odd since it cannot be divided by two to make a whole number.

21+9=20

It is odd.

5+5+5+5+1 That is only 5 numbers being added. There can be no answer for six numbers for the following reasons: The numbers are all odd. Two odd numbers make an even number. Two even numbers make an even number. 21 is odd. Take 6 odd numbers and add them up in pairs. Each pair of odd numbers gives an even number so there are 3 even numbers. Even + Even + Even = Even. So sum of any six odd numbers is even but 21 is not even.

odd * odd = odd answer even * even = even answer odd * even = even answer

"IT IS ALWAYS A ODD"

No. Sum of odd + odd = even Sum of odd + even = odd Sum of even + even = even

Odd

21 is the composite number because it's an odd number. 2 cannot be a composite number because it's even.