BREAKING: Target Test Prep releases Brand New 2026 On Demand GMAT prep course

Redeem

Progression - Sum

This topic has expert replies
Post new topic Post Reply
Previous Topic Next Topic
Source: — Problem Solving |
Senior | Next Rank: 100 Posts
Posts: 35
Joined: Mon Jun 23, 2008 1:41 pm
Thanked: 2 times

by mayur00 » Tue Sep 02, 2008 2:34 pm
I think identifying the pattern would be the fastest way of doing this.
Top
Legendary Member
Posts: 1153
Joined: Wed Jun 20, 2007 6:21 am
Thanked: 146 times
Followed by:2 members

by parallel_chase » Tue Sep 02, 2008 3:57 pm
I second Mayur's thoughts. I dont think there is faster way of doing this problem.
I think such problems are always based on patterns since nobody expects you to calculate all the 35 terms.

Well you have already done this but just for the sake of others who are not able to identify the pattern.

2,7,22,67,202,607

tens digit repeats itself after every 2 digits.
units digit repeats itself after every other digit.

35th term will have 2 at the tens place and 2 at the units place.

2+2 = 4
Top
Post new topic Post Reply
• Page 1 of 1