self Maths Puzzle Logical Reasoning Decision Making and Problem Solving

Using the digits of the decimal system, how many numbers lying between 5000 and 6000 (both inclusive), can be forme if,
(i) Repetition of digits is not allowed.
(ii) Repetition of digits is allowed.

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self Other Question

18 chairs are arranged around a hexagon such that there are 3 chairs per side. If 18 men are to be seated on these chairs, then how many different arrangements are possible? How many numbers greater than a million can be formed by using the digits 2, 3, 0, 3, 5, 2, 3 which will be divisible by 5?