1, -6, -9, 0, 45, 198, ?Series teasers are where you try to complete the sequence of a series of letters, numbers or objects.
What's the next number in this series?
1, -6, -9, 0, 45, 198, ? Answer675.-6=1*3+(-9) -9=-6*3+9 0=-9*3+27 45=0*3+45 198=45*3+63 -9, 9, 27, 45, 63 form an arithmetic sequence with common difference 18. and therefore, the next number is 675=198*3+81. Hide What Next?
Tweet
See another brain teaser just like this one... Or, just get a random 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. Back to Top |
