



 
Hi Mike, How many combinations of this four digit number 1028 can this produce only using one those numbers.
How many combinations of this four digit number 1028 can this produce only using two those numbers.
How many combinations of this four digit number 1028 can this produce only using three those numbers. How many combinations of this four digit number 1028 can this produce only using four those numbers. I hope this helps,  


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