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

    Get Free Puzzle Updates

Facebook Login
Site Registration

Find the missing number of the series: 8, 78, 318, 720, ?, 2010

+1 vote
202 views
Find the missing number of the series: 8, 78, 318, 720, ?, 2010
posted Oct 17, 2016 by anonymous

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

2 Answers

+2 votes

3^2 - 1 = 8
9^2 - 3 = 78
18^2 - 6 = 318
27^2 - 9 = 720
36^2 - 12 = 1284
45^2 - 15 = 2010

therefore answer is 1284

answer Oct 18, 2016 by Viswambher Kambhampati
–2 votes

8 = (3*1)^2-1
78 = (3*3)^2-3
318 = (3*6)^2-6
720 = (3*9)^2-9
1284 = (3*12)^2-12
2010 = (3*15)^2-15

Answer is 1284

answer Oct 18, 2016 by anonymous
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
...