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Find the units digit of the product of first 29 odd prime numbers. A.

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vishwash
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Find the units digit of the product of first 29 odd prime numbers. A. [#permalink] New post  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



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Re: Find the units digit of the product of first 29 odd prime numbers. A. [#permalink] New post  09 Sep 2017, 12:48
vishwash wrote:
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



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..



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Re: Find the units digit of the product of first 29 odd prime numbers. A. [#permalink]
09 Sep 2017, 12:48
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