Multiple choice general knowledge math & puzzles Find the next number.. 1,3,11,23,? 37 41 43 47 Reveal answer Fill a bubble to check yourself C Correct answer Explanation The sequence follows the pattern: 2^n + prime_n where n starts at 1: 2^1+(-1)=1, 2^2+(-1)=3, 2^3+3=11, 2^4+7=23, 2^5+11=43. The primes used are the sequence: -1, -1, 3, 7, 11 (every other prime starting from 3). The next number is 43.