Question

What is the units digit of the product of the first 50 primes?

Answer 1

Answer is 0

We don't need to take first 50 prime numbers and then multiply it

It follows a pattern , therefore no need to act foolish and do so much of calculation.

1×2×3×5 = 30 we get a multiple of 10 so whaterver may be multiplied afterwards, no change howsoever will be in the units digit

We can check it

In table of 10 or say 30 we get all the products having units digit as 0

Here is your answer

Hope it helps

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