NMO Problem 1

Algebra Level 5

A five-digit positive integer \(abcde_{10}\) (\(a\neq 0\)) is said to be a range if its digits satisfy the inequalities \(a<b>c<d>e\). For example, \(37452\) is a range. How many ranges are there? This problem is from the NMO.This problem is part of this set.

×

Problem Loading...

Note Loading...

Set Loading...