DIRECTION for the question: In the following question, five numbers are given. Out of these, four are alike in a certain way, but the rest one is different. Choose the one which is different from the other four.
(a) 6 (b) 12 (c) 18 (d) 9 (e) 7
Show Hint
Check divisibility patterns (2,3,5,7) in odd number questions.