Find the unit digit of product of the prime number up to 50 .
Prime number up to 50 are
2,3,5,7,11,...,43,47
Product = 2×3×5×7×11×−−−×43×472×3×5×7×11×−−−×43×47
Theres a term 2×5=102×5=10
So unit digit of product = 0.
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