7 Aristotle’s Number Puzzle October 27, 2007 by Sunil Kumar · Published October 27, 2007 · Last modified October 17, 2017
3 Most Interactive Billboard – A Genius Idea, Vertical Soccer October 7, 2007 by Sunil Kumar · Published October 7, 2007 · Last modified July 27, 2017
1 Common in Words Riddle December 2, 2017 by Sunil Kumar · Published December 2, 2017 · Last modified December 4, 2017