Odd or even calculator

Know if a number is odd or even is very easy. You just have to divide by two, but if you want to save it, our calculator will give you the result automatically.

Its operation is very simple. All you have to do is enter the number you want to know whether it is odd or even and press the calculate button to know the result.

How do you know if a number is odd or even?

To find out if a number is odd or even, you only need to divide it by two. If the remainder of that division is zero, that is, the division is exact, then you are dealing with an even number. Otherwise, it is an even number.

Examples:

  • Number 4: 4/2 = 2, it is an even number.
  • Number 5: 5/2 = 2.5, it is an odd number.

It is clear that figuring out whether a number is odd or even is quite easy and most people already know it just by looking at the last digit of the number and without the need to make the division between two.

Another trick to know if the number will be odd or even is as follows:

  • Pair x Pair = Pair
  • Odd x Even = Even
  • Odd x Even = Even
  • Odd x Odd = Even

Depending on the numbers involved in the multiplication, we will obtain an even result as long as any of the above combinations are present. In all other cases, we will obtain an odd result.

Is zero odd or even?

Odd or even

The number zero is considered even because it is an integer multiple of the number 2, i.e., zero multiplied by two equals zero.

Because of this, the number zero shares all the properties attributed to even numbers.

1 is odd or even

Another frequent doubt is whether the 1 is odd or even. We anticipate that one is odd but to check it, we divide it by 2 and we see that the division is not exact, therefore, it is odd.

1 / 2 = 0,5

If you have doubts with any other number, you can do the above check or use our online odd/even calculator to find out for sure.

When a function is odd or even

If you are doing exercises with functions, you may also have the question of when a function is even or odd.

Par function
Even function represented

A function is even when it fulfills these two premises:

  • f(x) = f(-x)
  • x and -x belong to the domain of the function

For example, even functions are the absolute value, x2the cos(x). We recommend that you draw them yourself on the coordinate axes to check that the following conditions are met. conditions for a function to be even.

When you do, you will see that the even functions have a symmetry with respect to the y-axis.

Graph of odd function
Graph of odd function

A function is odd when complies that:

  • f(-x) = -f(x)

When represented on the coordinate axes, the odd functions have an inverse symmetry with respect to the origin of coordinatesand therefore passes through the point (0,0).

Typical examples of odd functions are x, x3, sine(x) or the hyperbolic sine.

Odd numbers from 1 to 1000

To conclude, we leave you with a table with all the odd numbers from 1 to 1000. No doubt, it will be very useful for you to print it so that children can learn when a number is odd or even.

1101201301401501601701801901
3103203303403503603703803903
5105205305405505605705805905
7107207307407507607707807907
9109209309409509609709809909
11111211311411511611711811911
13113213313413513613713813913
15115215315415515615715815915
17117217317417517617717817917
19119219319419519619719819919
21121221321421521621721821921
23123223323423523623723823923
25125225325425525625725825925
27127227327427527627727827927
29129229329429529629729829929
31131231331431531631731831931
33133233333433533633733833933
35135235335435535635735835935
37137237337437537637737837937
39139239339439539639739839939
41141241341441541641741841941
43143243343443543643743843943
45145245345445545645745845945
47147247347447547647747847947
49149249349449549649749849949
51151251351451551651751851951
53153253353453553653753853953
55155255355455555655755855955
57157257357457557657757857957
59159259359459559659759859959
61161261361461561661761861961
63163263363463563663763863963
65165265365465565665765865965
67167267367467567667767867967
69169269369469569669769869969
71171271371471571671771871971
73173273373473573673773873973
75175275375475575675775875975
77177277377477577677777877977
79179279379479579679779879979
81181281381481581681781881981
83183283383483583683783883983
85185285385485585685785885985
87187287387487587687787887987
89189289389489589689789889989
91191291391491591691791891991
93193293393493593693793893993
95195295395495595695795895995
97197297397497597697797897997
99199299399499599699799899999

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