Hi Priyanshu,
You are saying to subtract first integer from the second integer and the integers are 6 and 18. So the answer will be 18 - 6 = 12.
I think your question is incomplete, you can ask the complete question again.
Feel free to ask doubts in the Comment Section.
I hope this information helps you.
Good Luck!
Regular exam updates, QnA, Predictors, College Applications & E-books now on your Mobile