6 numbers add to 21 April 20, 2014 by Sagar 12 Comments Number Puzzle #89 9 9 9 9 5 5 5 5 3 3 3 3 1 1 1 1 Out of these numbers six numbers add to 21. Challenge. What are the 6 numbers ? 6 numbers add to 21, Number Puzzle #89 Click here to See SolutionHide 11,1,3,3,3 it is intentionally made tricky