Inverted nine

In the hotel,, Inverted nine" each hotel room number is divisible by 6. How many rooms we can count with three-digit number registered by digits 1,8,7,4,9?

Result

n =  18

Solution:

Solution in text n =
Solution in text n = : Nr. 1

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To solve this verbal math problem are needed these knowledge from mathematics:

See also our permutations calculator. See also our variations calculator. Would you like to compute count of combinations?

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