Brain Teasers
5, 8, 11, 13, 15, 18, 21, 23, 25, ?
What's the next number in this series?
5, 8, 11, 13, 15, 18, 21, 23, 25, ?
5, 8, 11, 13, 15, 18, 21, 23, 25, ?
Answer
28.The nth entry is the nth composite number plus n.
5=4+1, 8=6+2, 11=8+3, 13=9+4, 15=10+5, 18=12+6, 21=14+7, 23=15+8, 25=16+9, 28=18+10.
Hide Answer Show Answer
What Next?
View a Similar Brain Teaser...
If you become a registered user you can vote on this brain teaser, keep track of which ones you have seen, and even make your own.
Solve a Puzzle
Comments hidden to avoid spoilers.
Follow Braingle!