Q:

The sum of the two - digit number is 6 and the number and its flip (digits written in reverse order) both are multiples of 3. If the difference between them is 36, then which of the following is the required number and its flip? 

• 1
  51 or 15
• 2
  42 or 24
• 3
  33 or 33
• 4
  60 or 06