S saha.subham Jul 2009 68 0 May 18, 2010 #1 explain why 2 * 3 * 5 * 7 + 27 and 3 * 7 * 11 + 19 are composite numbers.

K kompik Mar 2010 116 41 Bratislava May 19, 2010 #2 saha.subham said: explain why 2 * 3 * 5 * 7 + 27 and 3 * 7 * 11 + 19 are composite numbers. Click to expand... The first one is divisible by 3 (since both summands are). The second one is even (it is sum of two odd numbers).

saha.subham said: explain why 2 * 3 * 5 * 7 + 27 and 3 * 7 * 11 + 19 are composite numbers. Click to expand... The first one is divisible by 3 (since both summands are). The second one is even (it is sum of two odd numbers).

S saha.subham Jul 2009 68 0 May 19, 2010 #3 i have to show these numbers ae product of prime numbers but i am unable to do so because of the addition numbers

i have to show these numbers ae product of prime numbers but i am unable to do so because of the addition numbers