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CBSE Class 10 Answered

Q) if N is the sum of first 13986 prime numbers, then N is always divisible by: a)6 b)4 c)8 d)none of these
Asked by arindeep.singh | 22 Dec, 2020, 10:55: PM
answered-by-expert Expert Answer
first prime number is 2. After 2 every prime number is odd. So the sum of 13985 prime numbers will be odd( As adding odd numbers for odd number of times will give odd number only). Hence the sum  2 + first 13985 odd numbers will always be odd and will never divisible by even numbers. 
Answered by Utkarsh Lokhande | 24 Dec, 2020, 02:21: PM

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