An interesting GMAT problem solving practice question in permutation combination. The concept covered in this question is selecting one or more objects from a set of object, all of which are not distinct. The objects not being distinct is what makes this question an interesting one. This is another question that you can use as a template to solve questions that comprise … [Read more...] about Permutation Combination : Selecting from non distinct object
GMAT Arithmetic Theory & Practice Questions
Counting Methods : GMAT Problem Solving
This GMAT permutation combination practice question is a classic counting methods question focusing on numbers and number properties. You can use the explanation given in this question as a template to solve questions of this kind. After cracking the question, create your own variants of this question and try solving them to master this idea. Question How many odd 4 digit … [Read more...] about Counting Methods : GMAT Problem Solving
Statistics – Range – Problem Solving
10 distinct integers are arranged in ascending order. The range of the first 7 is 25 and that of last 7 is 30. What is the maximum range of the 10 numbers?A. 30B. 25C. 55D. 27E. 52Correct Answer is Choice E. 52. Explanatory AnswerLet the smallest of the 10 numbers be X1 and the largest be X10. The range for the 10 numbers is maximized when the smallest number is X1 is … [Read more...] about Statistics – Range – Problem Solving
GMAT Set Theory – Two sets
Of the 180 students in a school, at least 45% attended the prom night and at least 40% took part in the debating session. What is the maximum number of students who would have neither attended the prom night nor the debating session?A. 99B. 90C. 81D. 27E. 153Correct Answer - Choice E. 99 students attended neither of the events.Explanatory AnswerTotal 180 students.At least 45% … [Read more...] about GMAT Set Theory – Two sets
DS Number Properties – Divisibility – Prime Divisors
This is an interesting Data Sufficiency question that tests your understanding of divisibility, indices and prime factors.QuestionIf n is an integer, is n3 divisible by 54? 1. n2 is divisible by 6. 2. n3 is divisible by 36.Correct Answer : Choice D. Each statement is independently sufficient to answer the question.Explanatory AnswerFor "is" questions in DS, we … [Read more...] about DS Number Properties – Divisibility – Prime Divisors