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Q: Is there always an even number before every odd number in the set of whole numbers?

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yes there is!

one (1) and the number itself

There is an even number before and after every odd number and vice versa.

Yes.

Every integer is the number/1 so it can always be described as a ratio between 2 numbers.

Yes, every whole number is an integer.

Yes there is because some numbers which are called odd numbers dont have halfs. But evens do. You cant change it . E.G: 15 Has no half but 16 does 17 doesnt but 18 does...... As u see it goes on and on and on!

By definition, every even number has 2 as a factor. That means that, at a minimum, every set of even numbers will have a common factor of 2. The GCF could be higher, of course, but that common factor of 2 will always be there, making the numbers even.

Yes. Rational numbers are always the quotient of two integers. Integers are always real, and you cannot divide a real number by another real number and get an imaginary number. So, true.

No but every integer is a rational number and numbers that can be expressed as fractions are also rational numbers

Because 1 is a factor of every number.

No. Every real number is not a natural number. Real numbers are a collection of rational and irrational numbers.

No. Every rational number is not a whole number but every whole number is a rational number. Rational numbers include integers, natural or counting numbers, repeating and terminating decimals and fractions, and whole numbers.

Not always because in some numeracy systems numbers are represented by letters, symbols or even pictorial images.

Yes. Every integer is a rational number. Every rational number is a real number. Every real number is a complex number. The complex numbers include all real numbers and all real numbers multiplied by the imaginary number i=sqrt(-1) and all the sums of these.

3; every number -exept 0- before or behind the comma is significant. Not significant are zeros after numbers that follow the comma; 2.53000000000Also every 0 before numbers before the comma; 00000000032.32 or just 0000253. A zero alone in front of the comma is a significant number

Even numbers, by definition, are divisible by 2. That means that every even number has at least one 2 as a factor. If every even number has one, then any set of even numbers will have at least one 2 as a common factor. Since that number has two as a factor, it's even.

The set of real numbers is defined as the union of all rational and irrational numbers. Thus, the irrational numbers are a subset of the real numbers. Therefore, BY DEFINITION, every irrational number is a real number.

Random lottery numbers, every time! I think it's great to mix it up, but I also like to see my numbers before I buy my ticket. I play the euro millions a bit more than the lottery as the rollover jackpots always look appealing! In theory it doesn't matter how you select the numbers so long as you pick the rquired number of numbers.

Three. If you were to have a number like 0.00050, every zero before a number of 1 or higher is not considered a significant number, meaning the example here would have only two significant numbers.

No. Consider 15: 1,3,5,15 Every positive whole number has an even number of factors, unless the number is a perfect square.

The premise of your questions is false: NOT every number is a prime number.

Yes. Every number is a real number. Rational numbers, irrational numbers, Whole numbers, Natural numbers, integers are all real numbers.

Every whole number is rational and an integer. But the "natural" numbers are definedas the counting numbers, so the negative whole numbers wouldn't qualify.No and yes: it is not a natural number but it is a rational number.

No many elements have multiple isotopes with different numbers of neutrons. Every atom of a certain isotope has the same number of neutrons