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#69 Backward drops
Set by Katie Steckles and Peter Rowlett
Imagine a number sequence, created from the normal sequence of whole numbers, where each term is that number written backwards, e.g. the 12th term is 21 (and any leading zeroes are ignored). This goes 1, 2, 3, 4, 5, 6, 7, 8, 9, 1, 11, 21, 31, 41, and so on. Each of these numbers is bigger than the last, except that after 9 we get a drop to the next number, which is 1.
When is the next drop?
What is the largest drop in the first 100…
