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.
Apr 2808:00 AM PDT
-11:00 AM PDT
Whether you are just beginning your MBA journey or fine-tuning your path to a 700+ score, GMAT Day is designed to give you a competitive edge.
Apr 2711:00 AM EDT
-12:00 PM EDT
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
08 May 2021, 21:59
Kudos
Bookmarks
In 1990s, phone numbers in Maharastra, India, has the following format:
Y X1 X2 − X3 X4 X5 X6,
The first three digits are an area code where Y is an integer between 2 and 9 (inclusive) and Xi for all 1 ≤ i ≤ 6 are integers between 0 and 9 (inclusive). In addition, the digit Xi for 3 ≤ i ≤ 6 cannot all 0 (phone number 0000 is not allowed). Some valid phone numbers are 250-1234, 700-0101, and 321-1000, while some invalid phone numbers are:
020-1234 (because the area code start with 0),
110-0001 (because the area code start with 1), and
234-0000 (because the digit Xi for 3≤i≤6 cannot all 0).
How many different phone numbers are there?
please help
Y X1 X2 − X3 X4 X5 X6,
The first three digits are an area code where Y is an integer between 2 and 9 (inclusive) and Xi for all 1 ≤ i ≤ 6 are integers between 0 and 9 (inclusive). In addition, the digit Xi for 3 ≤ i ≤ 6 cannot all 0 (phone number 0000 is not allowed). Some valid phone numbers are 250-1234, 700-0101, and 321-1000, while some invalid phone numbers are:
020-1234 (because the area code start with 0),
110-0001 (because the area code start with 1), and
234-0000 (because the digit Xi for 3≤i≤6 cannot all 0).
How many different phone numbers are there?
please help
09 May 2021, 00:57
Kudos
Bookmarks
Hello agmy302,
Unfortunately you need to follow a certain format for posting questions, and you haven't followed that.
Please go through the link : https://gmatclub.com/forum/rules-for-po ... 33935.html and please keep in mind going forward that posts have to be made in accordance with the rules stated in the link or else strict action will be taken against you.
Have a great day.
Unfortunately you need to follow a certain format for posting questions, and you haven't followed that.
Please go through the link : https://gmatclub.com/forum/rules-for-po ... 33935.html and please keep in mind going forward that posts have to be made in accordance with the rules stated in the link or else strict action will be taken against you.
Have a great day.
ramlala
Joined: 22 Aug 2020
Last visit: 13 Dec 2022
Posts: 467
Own Kudos:
Given Kudos: 30
Location: India
Concentration: International Business, Finance
Schools: IIMA PGPX'23 INSEAD Jan'23 intake Sloan (MIT) ISB HEC Said
GPA: 4
WE:Project Management (Energy)
09 May 2021, 20:12
Kudos
Bookmarks
agmy302
Y = between 2 and 9 (inclusive) = 8
X1 = between 0 and 9 (inclusive) = 10
X2 = between 0 and 9 (inclusive) = 10
X3 = between 0 and 9 (inclusive) = 10
X4 = between 0 and 9 (inclusive) = 10
X5 = between 0 and 9 (inclusive) = 10
X6= between 0 and 9 (inclusive) = 10
Total = (8 x 10^6) - 1
Here -1 is for X3 X4 X5 X6 - 0000 that is not allowed
