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Find the unit digit of the product of al...

Find the unit digit of the product of all the elements of the set which consists all the prime numbers greater than 2 but less than 222.

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The set of required prime numbers ={3,5,7,11,...} Since there is no any even number in the set so when 5 is multiplied with any odd number, it always gives 5 as the last digit
Hence the unit digit will be 5.
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