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Sunday, April 1, 2007

"ALGEBRA QUESTION OF THE DAY"

If the sum of two prime numbers x and y is odd, then the product of x and y must be divisible by
(A) 2 (B) 3 (C) 4 (D) 5 (E) 8

6 comments:

Anonymous said...: the first two prime numbers are 2 and 3 and their sum is odd(5)
so the product is divisible both by 2 and 3
so why it is not B; April 2, 2007 at 12:02 AM
Anonymous said...: A

@above

dude,it is asked in qs tht it must be divisible by the ans...; April 2, 2007 at 2:49 AM
Anonymous said...: 6 is divisible by A)2
and B)3 so is 3 not in the answer; April 2, 2007 at 5:17 AM
FLORINA said...: a . is the answer
any prime number other than two is odd
and sum of two odd numbers is always even as such among x and y one has to be 2 for x+y to be odd
therefore x*y should always be divisible by 2; April 5, 2007 at 10:47 AM
Nikhil said...: a

take one more eg say 11 and 2

11*2=22
divisible by 2; April 8, 2007 at 8:27 PM
Anonymous said...: A; September 18, 2008 at 4:28 AM