Mind Teasers : Toughest Number Series Question May 13, 2016Logic Puzzles, Maths Puzzles, WhatsApp1456, 14567911?, math puzzle, number series, puzzle, riddle, series question, toughest number series, whatsapp, whatsapp puzzleadminQuestion : Solve the number series by identifying the last number. 1 4 5 6 7 9 11 ?Answer : 100 Series of number that do not contain alphabet ‘T’ Share this:Click to share on Facebook (Opens in new window)Click to share on Google+ (Opens in new window)Click to share on Twitter (Opens in new window)Click to share on Pinterest (Opens in new window)Click to share on LinkedIn (Opens in new window)Click to share on Reddit (Opens in new window)Click to share on WhatsApp (Opens in new window)