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Well this can't be done coz there are are 5 blanks awhich are odd in number and number to be filled in those blanks are also odd
odd times odd is always an odd number but we know that 30 is an even in number
however some uses 3!+3!+3!+3!+3!=30
which i think is wrong coz numerical value of 3! is 6 which is not given
there are 5 boxes so u have to use two for operation