Events & Promotions
|
|
GMAT Club Daily Prep
Thank you for using the timer - this advanced tool can estimate your performance and suggest more practice questions. We have subscribed you to Daily Prep Questions via email.
Customized
for You
Track
Your Progress
Practice
Pays
Not interested in getting valuable practice questions and articles delivered to your email? No problem, unsubscribe here.
Nov 2007:30 AM PST
-08:30 AM PST
Learn what truly sets the UC Riverside MBA apart and how it helps in your professional growth
Nov 2011:00 AM EST
-11:59 PM EST
Don’t miss Target Test Prep’s biggest sale of the year! Grab 25% off any Target Test Prep GMAT plan during our Black Friday sale. Just enter the coupon code BLACKFRIDAY25 at checkout to save up to $625.
Nov 2001:30 PM EST
-02:30 PM IST
Learn how Kamakshi achieved a GMAT 675 with an impressive 96th %ile in Data Insights. Discover the unique methods and exam strategies that helped her excel in DI along with other sections for a balanced and high score.
Nov 2206:30 AM PST
-08:30 AM PST
Let’s dive deep into advanced CR to ace GMAT Focus! Join this webinar to unlock the secrets to conquering Boldface and Paradox questions with expert insights and strategies. Elevate your skills and boost your GMAT Verbal Score now!
Nov 2211:00 AM IST
-01:00 PM IST
Do RC/MSR passages scare you? e-GMAT is conducting a masterclass to help you learn – Learn effective reading strategies Tackle difficult RC & MSR with confidence Excel in timed test environment- Nov 23
11:00 AM IST
-01:00 PM IST
Attend this free GMAT Algebra Webinar and learn how to master the most challenging Inequalities and Absolute Value problems with ease. 
Nov 2407:00 PM PST
-08:00 PM PST
Full-length FE mock with insightful analytics, weakness diagnosis, and video explanations!
Nov 2510:00 AM EST
-11:00 AM EST
Prefer video-based learning? The Target Test Prep OnDemand course is a one-of-a-kind video masterclass featuring 400 hours of lecture-style teaching by Scott Woodbury-Stewart, founder of Target Test Prep and one of the most accomplished GMAT instructors.
02 Mar 2021, 20:53
Kudos
Bookmarks
A
Be sure to select an answer first to save it in the Error Log before revealing the correct answer (OA)!
Difficulty:
65%
(hard)
Question Stats:
54% (02:03) correct
46%
(01:59)
wrong
based on 174
sessions
History
Date
Time
Result
Not Attempted Yet
If n is a positive integer, what is the tens' digit of 7^n?
(1) n is divisible by 4.
(2) n is divisible by 3.
(1) n is divisible by 4.
(2) n is divisible by 3.
02 Mar 2021, 22:30
Kudos
Bookmarks
akshayuberoi
In actual, the questions may stick to units digit only, because the tens digit, as in this question, would just involve intensive calculations and no technique.
If a question has been asked for units digit or tens digit, more often than not, you will get your answer by finding pattern.
\(7^0=01\)
\(7^1=07\)
\(7^2=49\)
\(7^3=343\) or 43
\(7^5=43*7\)=301 or 01
\(7^6=01*7=07\)
......
Thus the last two digits are cyclic after every 4 terms => 07, 49, 43, 01, 07......
Pattern of units digit => 7, 9, 3, 1, 7...
Pattern of tens digit => 0, 4, 4, 0 ...
(1) n is divisible by 4.
So the tens digit will be 0
Sufficient
(2) n is divisible by 3.
If it is 3, then it is 4. But if it is 9, that is 4*2+1, the tens digits will be 0.
Insufficient
A
23 May 2023, 01:20
Kudos
Bookmarks
For those who read Ten's digit as Unit's digit. I feel for you. You and I are on the same boat. Keep up the grind!
