Multiple choice general knowledge math & puzzles 1, 3, 6, 10 ... what is the Next Nunmber? 13 14 17 15 Reveal answer Fill a bubble to check yourself D Correct answer Explanation This sequence follows a pattern of increasing differences: 1+2=3, 3+3=6, 6+4=10. The next number is 10+5=15. This is a classic triangular number sequence where each term represents the sum of consecutive natural numbers.