Posted by TUHITUHI on Monday, September 10, 2012 at 8:16am.
A no consists of 2 digits whose product is 18 when 27 is subtracted from the no the digit inter change find the number

math  Steve, Monday, September 10, 2012 at 11:08am
the digits are a,b
a*b = 18
10a+b  27 = 10b + a
a=6 b=3
check:
63  27 = 36