Many numbers are like this. One example is 101, 202, 1991, and so on.
There is a pattern there- a reciperical of a number is simply the number backwards.
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The reciprocal of a number plus the reciprocal of twice the number equals Find the number. 1/2 find the number
0 has no reciprocal
The reciprocal of any number is 1 divided by that number. The reciprocal of 5n is therefore 1/5n.
There is no name other than a reciprocal whole number.
To get the reciprocal of any number, just divide 1 by that number. To check the result: the number times its reciprocal must equal 1.