Your hash structure does not look too clear to me.

But from what I understand it should be:

%hash = (

        4 => \( 4, 'mango' ) 
        ...

        )
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If this is indeed the structure you can access 10,04, ... as follows:

@{ $hash[4] }[0] will give 10
@{ $hash[4] }[1] will give Mango
@{ $hash[2] }[0] will give 04
@{ $hash[3] }[0] will give 20

and so on ...
[download]

If you can tell us how you initialized your Hash, maybe things could be clearer.