Doubling numbers
Number Theory
Level
pending
What is the 2017th smallest positive integer that gains a digit when doubled?
For example, 57 is one such integer, because it has two digits, and when doubled, has 3 digits.
The answer is 6461.
This section requires Javascript.
You are seeing this because something didn't load right. We suggest you, (a) try
refreshing the page, (b) enabling javascript if it is disabled on your browser and,
finally, (c)
loading the
non-javascript version of this page
. We're sorry about the hassle.
1 solution
5,6,7,8,9—one digit number —5 numbers 50,51…….......99-two digit numbers-50 numbers 500,501.........999- three digit numbers-500 numbers 1462 numbers are left now numbers will be counted from 5000 So 1462th number from 5000 is 6461.