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## Answers

If they are not repeated then (9*8*7)=504 3 digits numbers are forms.

so 3 numbers needed to be arranged taken 2 at a time

so 3 × 3 = 9 numbers can be formed

and if not repeated ³P₂ = 3 × 2 = 6 numbers

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If they are not repeated then (9*8*7)=504 3 digits numbers are forms.

so 3 numbers needed to be arranged taken 2 at a time

so 3 × 3 = 9 numbers can be formed

and if not repeated ³P₂ = 3 × 2 = 6 numbers