SOLUTION: An increasing number has its digits increase in size from left to right. For example 24589 is an increasing number. How many four digit increasing numbers are there?
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Question 1133637: An increasing number has its digits increase in size from left to right. For example 24589 is an increasing number. How many four digit increasing numbers are there? Answer by MathLover1(20850) (Show Source):
You can put this solution on YOUR website! choose out of
there can be ONLY way the can be arranged in ascending order, so selection is what we are looking for and NOT arrangements
BUT it contains numbers with in thousands digit making these 3-digit numbers
so .......deduct it from
