An interesting Problem Solving question from Number Theory. You need to know all the basic properties of LCM and HCF of two numbers and the relation between LCM and HCF. If you are already not familiar with the topics, start with understanding what LCM and HCF actually denote (not what the acronyms … [Read more...]

## Simple Number Properties

If the integer N = 139,k50 where k is the hundreds digit, N can NEVER be divisible by which of the following? A. 2 B. 3 C. 4 D. 6 E. 9 Explanatory Answer Let us quickly recap tests of divisibility for the 5 numbers given in the question. Test of divisibility for 2: The number should … [Read more...]

## GMAT Mixtures & Ratio

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. … [Read more...]

## Number Properties : Factors

Here is an interesting GMAT number property problem solving question. Concept tested : number of factors.Integer x has n factors; 3x has 3 factors; Which of the following values can n take? I. 1 II. 2 III. 3 A. I only B. II only C. I or II D. II or III E. I or III … [Read more...]

## GMAT : Descriptive Statistics

Here is a simple descriptive statistics question.When a student Joe, weighing 41 kg, joins a group of students whose average weight is 30 kg, the average weight goes up by 1 kg. Subsequently, if two students, excluding Joe, leave the group the average weight comes back to 30 kg. What is the … [Read more...]

## Linear Equations : Common Multiples

QuestionA shop sells two variants of chocolates - one that costs $3 and the other that costs $5. If the shop sold $108 chocolates on a given day, how many different combinations of (number of $3 sold, number of $5 sold) exist?A. 6B. 7C. 15D. 8E. 12Correct Answer : Choice D. 8Explanatory AnswerLet … [Read more...]

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