Brain Teasers
5, 15, 27, ...
What are the next two numbers in this series?
5, 15, 27, 45, 63, 81, __, __
5, 15, 27, 45, 63, 81, __, __
Hint
It has to do with the digit numbers.Answer
The next two numbers are 99 and 135.The pattern is:
Take the digits like "5" for example, and multiply it by 2, you get 10. 5 plus 10 equals 15. For 15, one plus five (the digits!) equals 6. 6 multiplied by 2 is 12. 12 + 15 equals the next number, 27.
Hide Hint Show Hint 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!