Math CentralQuandaries & Queries


Question from tonnie, a student:

Hi, im tonnie,

my question is what are all the 4 digit number combinations that start with the number 2?

Hi Tonnie,

A while ago I answered a question that asked for all 4 digit numbers. Use the same technique to construct a list of all three digit numbers and then put a 2 in front of each of them to obtain the list of the four digit numbers you want.


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