99999
Wiki User
∙ 9y ago15 of them.
27
More than one
6
Possible solutions - using your rules are:- 11,13,17,31,33,37,71,73 &77
There are 60480 numbers.
There are 4^6 = 4096 such numbers.
8.
If the digits are all different then 18. Otherwise, 192.
15 of them.
There are 900 of them.
27 if the digits can be repeated. 6 if not.
27
Assuming each of the given digits can be used only once, the answer is 24. If not, the answer is infinity.
48 of them if digits may not be repeated. 100 if they can.
More than one
6