What is the units digit of the product of all prime numbers between 1 and 100?
(b) 1
(c) 2
(d) 3
(a) 0
Answers
Answered by
0
Answer:
Since2×5=10, so 10 multiplied by all other numbers will give unit place digit as 0.
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Answered by
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Answer:
Since 2 is the only even prime number and the list of prime numbers also consist of 5.
Product of 2 and 5 is 10.
If 10 is multiplied to any number, the last digit must be 0.
So, the product of first ’n’( n>2) prime numbers must have 0 as the last digit.
Hence, the product of prime numbers between 1 and 100 ends with 0.
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