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09 Sep 2017, 12:27
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Find the units digit of the product of first 29 odd prime numbers.
A. 7
B. 3
C. 5
D. 9
E. None of the above
A. 7
B. 3
C. 5
D. 9
E. None of the above
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devarshi9283
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09 Sep 2017, 12:48
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vishwash
Find the units digit of the product of first 29 odd prime numbers.
A. 7
B. 3
C. 5
D. 9
E. None of the above
A. 7
B. 3
C. 5
D. 9
E. None of the above
Since first 29 odd prime nos are 3,5,7,11...and so on...
5 will always be there at the unit digit since any odd no. multiplied by 5 would result in 5 as unit digit.
Easy one..
Archived Topic
Hi there,
This topic has been closed and archived due to inactivity or violation of community quality standards. No more replies are possible here.
Where to now? Join ongoing discussions on thousands of quality questions in our Problem Solving (PS) Forum
Still interested in this question? Check out the "Best Topics" block above for a better discussion on this exact question, as well as several more related questions.
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