An interesting Problem Solving question from Number TheoryIf the LCM of two numbers a and b is 1104 and their HCF is 4, which of the following MUST be true?I. a * b = 4416 II. a and b are both divisible by 8 III. a : b = 48 : 23A. I onlyB. II onlyC. I and III onlyD. II and III onlyE. I, II, and III … [Read more...]

## Simple Number Properties Question

If the integer N = 139,k50 where k is the hundreds digit, N can NEVER be divisible by which of the following?A. 2B. 3C. 4D. 6E. 9 … [Read more...]

## GMAT Mixtures – Problem Solving Question

60% of the students in a class are instate students. 60% of the students in the class are women. If there are twice as many instate men in the class as are instate women, and the number of instate men exceeds instate women by 12, how many more women in the class are not instate women?A. 12B. 60C. 48D. 24E. 0 … [Read more...]

## Data Sufficiency : Number Properties and Probability

A Data Sufficiency Question - Number properties and ProbabilitySet A contains distinct integers: A = {2,4,6,-8,x,y}. When two numbers from this set are picked and multiplied, what is the probability that the product is less than zero?(1) x*y is not equal to zero.(2) |x| = |y|Correct Answer is choice B. Statement 2 alone is sufficient.Explanatory AnswerAlternatively, here is the … [Read more...]

## Arithmetic Mean – Data Sufficiency

Here is an easy Descriptive Statistics Data Sufficiency Question What is the median of a set of 10 positive integers? 1. The numbers are in an AP with the first term being 10 2. The arithmetic mean of these 10 numbers is 55Answer - Choice CExplanatory Answer Break down the process of solving any DS question into 3 mandatory steps and 1 optional step.Step 1 : … [Read more...]