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.
Jul 1410:00 AM PDT
-11:59 PM PDT
GMAT Preparation Online - A limited time sale use code: EXPERTSGLOBAL10
Jul 1808:30 AM PDT
-09:30 AM PDT
Wondering how to craft compelling Career goals for your "Why MBA" essay? In this video, Gunjan Jhunjhunwala, seasoned MBA expert at The Red Pen, will walk you through how to: Define clear short-term and long-term goals, and more.- Jul 19
09:00 AM PDT
-11:00 AM PDT
Struggling to stay on time during Multi-Source Reasoning (MSR) questions on the GMAT? In this video, GMAT expert Karishma Bansal (founder of ANA Prep) breaks down a 3-minute scanning strategy that can help you save critical time... 
Jul 1911:00 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
Jul 1911:30 AM EDT
-12:30 PM EDT
Struggling to find the right strategies to score a 99 %ile on GMAT Focus? Riya (GMAT 715) boosted her score by 100-points in just 15 days! Discover how the right mentorship, tailored strategies, and an unwavering mindset can transform your GMAT prep.- Jul 20
10:00 AM PDT
-11:00 AM PDT
Join us in a live GMAT Verbal practice session to solve 10 tough questions from the Reading Comprehension section tested in the GMAT Verbal section. Take this quiz with other test takers in timed conditions.
25 Apr 2019, 03:03
Kudos
Bookmarks
A
Be sure to select an answer first to save it in the Error Log before revealing the correct answer (OA)!
Difficulty:
95%
(hard)
Question Stats:
33% (02:19) correct
67%
(02:16)
wrong
based on 131
sessions
History
Date
Time
Result
Not Attempted Yet
Back in 1930, Tillie had to memorize her multiplication facts from 0*0 to 12*12. The multiplication table she was given had rows and columns labeled with the factors, and the products formed the body of the table. To the nearest hundredth, what fraction of the numbers in the body of the table are odd?
(A) 0.21
(B) 0.25
(C) 0.46
(D) 0.5
(E) 0.75
(A) 0.21
(B) 0.25
(C) 0.46
(D) 0.5
(E) 0.75
25 Apr 2019, 10:40
Kudos
Bookmarks
Total number of rows = 12-0+1 = 13
Total number of columns = 12-0+1 = 13
Body will contain 169 elements.
Only Odd*Odd = Odd.
So the total number of odd products in each row = 6 (6 even and 6 odd products)
And we need to reject the even columns, as the products will all be even.
Hence the numbers of columns with odd products = 6
Total odd products in body = 6*6 = 36
Fraction of odd in the body = 36/169
36*4 = 144
144+18 = 162 = almost equal to 4.5 times 36
36/169 = 1/4.5 = 1/(9/2) = 2/9 = 0.22 (1/9 = 0.1111)
Hence A is the closest answer.
Total number of columns = 12-0+1 = 13
Body will contain 169 elements.
Only Odd*Odd = Odd.
So the total number of odd products in each row = 6 (6 even and 6 odd products)
And we need to reject the even columns, as the products will all be even.
Hence the numbers of columns with odd products = 6
Total odd products in body = 6*6 = 36
Fraction of odd in the body = 36/169
36*4 = 144
144+18 = 162 = almost equal to 4.5 times 36
36/169 = 1/4.5 = 1/(9/2) = 2/9 = 0.22 (1/9 = 0.1111)
Hence A is the closest answer.
25 Apr 2019, 17:04
Kudos
Bookmarks
I used visualization.
1 2 3 4 5 6 7 8 9 10 11 12
2
3
4
5
6
7
8
9
10
11
12
Any time an odd number crosses with an even, the product is even. So we can only include odd * odd numbers in this set.
There are 6 rows of odd numbers * 6 columns of odd numbers.
36 /144 = 1/4
Let us not forget that the table includes factors of 0, an even number so the answer must be less than .25
1 2 3 4 5 6 7 8 9 10 11 12
2
3
4
5
6
7
8
9
10
11
12
Any time an odd number crosses with an even, the product is even. So we can only include odd * odd numbers in this set.
There are 6 rows of odd numbers * 6 columns of odd numbers.
36 /144 = 1/4
Let us not forget that the table includes factors of 0, an even number so the answer must be less than .25
