# What the Heck is a Weighted Average?

- Aug 11, 07:47 AM   Comments [1]

This post was written by Rich Zwelling, one of Knewton's awesome GMAT prep instructors. For more GMAT help, check out the Knewton GMAT blog. If you've done some GMAT preparation already, you've likely come across the concept of "weighted averages." But what does that term really...

# GMAT Question of the Day (Aug 11): Combinations and Critical Reasoning

- Aug 11, 02:00 AM   Comments [0]

Math (PS) 10 business executives and 7 chairmen meet at a conference. If each business executive shakes the hand of every other business executive and every chairman once, and each chairman shakes the hand of each of the business executives but not the other chairmen, how...

# GMAT Question of the Day (Aug 8): Arithmetic and Sentence Correction

- Aug 8, 02:00 AM   Comments [1]

Math (PS) What is the value of if the sum of odd, consecutive, positive integers from 1 to equals 441? (A) 47 (B) 41 (C) 37 (D) 33 (E) 29 GMAT Daily Deals 65% of students miss this data sufficiency question > How would you approach it? Knewton explains Need help with...

# GMAT Question of the Day (Aug 3): Probability and Critical Reasoning

- Aug 3, 02:00 AM   Comments [0]

Math (PS) A flower shop has 2 tulips, 2 roses, 2 daisies, and 2 lilies. If two flowers are sold at random, what is the probability of not picking exactly two tulips? (A) (B) (C) (D) (E) GMAT Daily Deals Experience the Manhattan GMAT difference at one of...

# GMAT Question of the Day (Aug 1): Combinations and Critical Reasoning

- Aug 1, 02:00 AM   Comments [1]

Math (PS) Carly has 3 movies that she can watch during the weekend: 1 Action movie, 1 Comedy, and 1 Drama. However, she needs to watch the Drama 3 times. Assuming Carly has time for 5 movies and intends to watch all of them, in how...

# GMAT Question of the Day (Jul 28): Word Problem and Sentence Correction

- Jul 28, 02:00 AM   Comments [0]

Math (PS) Kate and David each have \$10. Together they flip a coin 5 times. Every time the coin lands on heads, Kate gives David \$1. Every time the coin lands on tails, David gives Kate \$1. After the coin is flipped 5 times, what is...

# GMAT Question of the Day (Jul 25): Counting and Critical Reasoning

- Jul 25, 02:00 AM   Comments [0]

Math (PS) The choir consists of 5 boys and 6 girls. In how many ways can the singers be arranged in a row, so that all the boys are together? Do not differentiate between arrangements that are obtained by swapping two boys or two girls. (A) 120 (B)...

# GMAT Question of the Day (Jul 20): Mixture Problem and Critical Reasoning

- Jul 20, 02:00 AM   Comments [0]

Math (PS) There are two bars of gold-silver alloy; one piece has 2 parts of gold to 3 parts of silver, and the other has 3 parts of gold to 7 parts of silver. If both bars are melted into a 8-kg bar with the final...

# GMAT Question of the Day (Jul 18): Counting and Sentence Correction

- Jul 18, 02:00 AM   Comments [0]

Math (PS) If one of two parallel lines has 7 points on it and the other has 8, how many triangles can be drawn using the points? (A) 168 (B) 196 (C) 316 (D) 364 (E) 455 GMAT Daily Deals Save \$100, plus get a \$275 bonus offer from GMAT Club when you...

# Quick Mental Math: Averages

- Jul 15, 07:15 AM   Comments [0]

This post was written by Rich Zwelling. For more GMAT prep tips, check out the Knewton GMAT blog. I run the risk of sounding like a hypocrite here. I'm often fond of telling my students that the GMAT is a reasoning test, not a...