top button
Flag Notify
    Connect to us
      Facebook Login
      Site Registration Why to Join

    Get Free Puzzle Updates

Facebook Login
Site Registration

What is the next number in the series. 15; 29; 56; 108; 208; ?

+1 vote
61 views
What is the next number in the series. 15; 29; 56; 108; 208; ?
posted Apr 24 by Mridul

Share this puzzle
Facebook Share Button Twitter Share Button Google+ Share Button LinkedIn Share Button Multiple Social Share Button

2 Answers

0 votes

400
.
15 * 2 - 1 = 29
29 * 2 - 2 = 56
56 * 2 - 4 = 108
108 * 2 - 8 = 208
208 * 2 - 16 = 400

answer Apr 24 by Jcm
0 votes

15 x 2 - 2^0 = 29
29 x 2 - 2^1 = 56
56 x 2 - 2^2 = 108
108 x 2 - 2^3 = 208
208 x 2 - 2^4 = 400.

answer Apr 24 by Tejas Naik
Contact Us
+91 9880187415
sales@queryhome.net
support@queryhome.net
#280, 3rd floor, 5th Main
6th Sector, HSR Layout
Bangalore-560102
Karnataka INDIA.
QUERY HOME
...