Maths Olympiad Prep

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Number theory Difficulty 2.0 Junior Find the answer United Kingdom

A palindromic number is a number that reads the same when the order of its digits is reversed. What is the difference between the largest and smallest five-digit palindromic numbers that are both multiples of 45?

(A) 91809180 (B) 90909090 (C) 90009000 (D) 89108910 (E) 81908190

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