The number 642 is added to a 3-digit number 7x2 to give a 4 digit 13y4 which is exactly divisible by 11.find xy  Choose the correct choice from the following choices:  A) 12  B) 13  C) 14  D) 15  E) 16
if a number is divisible by 11,means diff b/w it's digits at odd and even place should be 0 or multiples of 11.   so 13y4 1+y=3+4 y=6 therefore no is 1364   now subtract 642 from 1364=722   therefore x=2   xy=12   12NSWER:12
<result>A</result>
The number 642 is added to a 3-digit number 7x2 to give a 4 digit 13y4 which is exactly divisible by 11.find xy