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Find the unit digit of product of the prime number up to 50 .

0
1
-1
11
Explanation:

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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