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GMAT Math

GMAT Descriptive Statistics : Averages

January 23, 2012 By K S Baskar Leave a Comment

Question If the average of 5 positive integers is 40 and the difference between the largest and the smallest of these 5 numbers is 10, what is the maximum value possible for the largest of these 5 integers? A. 50B. 52C. 49D. 48E. 44 Correct Answer : Choice D. 48 ExplanationThe average of 5 positive integers is 40. i.e., the sum of these integers = 5*40 = 200 Let … [Read more...] about GMAT Descriptive Statistics : Averages

Number Properties – divisibility and remainders

November 8, 2010 By K S Baskar 1 Comment

When a positive integer A is divided by 5 and 7, the remainders obtained are 3 and 4, respectively. When the positive integer B is divided by 5 and 7, the remainders obtained are 3 and 4, respectively. Which of the following is a factor of (A - B)? (A) 12 (B) 24 (C) 35 (D) 16 (E) 30 Correct Answer : Choice C Explanatory Answer When A is divided by 5, the remainder is 3. So, … [Read more...] about Number Properties – divisibility and remainders

Number properties – Factorial

November 8, 2010 By K S Baskar Leave a Comment

How many trailing zeroes does 60! have?(A) 12(B) 9(C) 15(D) 14(E) 13 … [Read more...] about Number properties – Factorial

Data Sufficiency : A Quick Overview

November 14, 2009 By K S Baskar 1 Comment

GMAT Data Sufficiency I personally love the 'Data Sufficiency' section - because it is fun to solve them ! Broadly two reasons (1) It probably may not involve as much rigorous mathematical solving and (2) Each problem is a field of landmines that the examiner has laid for the student. I have a feeling that even for the test setter, the data sufficiency section is the … [Read more...] about Data Sufficiency : A Quick Overview

GMAT – Useful percent to fraction conversion

November 28, 2008 By K S Baskar 1 Comment

Percent to Fraction Conversion

A set of useful percent to fraction coversions that will save a lot of time when attempting problem solving questions in the GMAT Quant section. Percentages Equivalent Fraction 33.33% 1/3 16.66% or 16.67% 1/6 66.66% or 66.67% 2/3 6.66% or 6.67% 2/30 or 1/15 14.28% 1/7 12.5% 1/8 11.11% 1/9 9.09% 1/11 8.33% 1/12 7.14% 1/14 Let us say you have a question that states that a family … [Read more...] about GMAT – Useful percent to fraction conversion

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