The Knewton Blog



This is a tricky Data Sufficiency question that over 50% of students miss. Can you tackle it? Try it out, then leave your answer in the comments. When you’re ready to see how you did, check out the video explanation from our GMAT teacher, Jess. If f(x) = ax² + bx + c, and a does not equal 0, at what point does the graph of the function f(x) intersect the y-axis? The graph of… Read more

Posted in Challenge Discussions, GMAT, Quant Guide | 22 comments



This is a Data Sufficiency problem from Session 5, Extra Practice HW 3 (Quantitative Strategy). So far, 63.5% of Knewton students have missed it. How would you approach it? Try it out, then share your answers, questions, and thought processes in the comments below. Remember, if you’re in our GMAT class now, add your teacher name and session to your comment (e.g., Zwelling, MW 1:30). We’ll post the official answer (in video form!) in a week… Read more

Posted in Challenge Discussions, GMAT, Quant Guide | 83 comments



This is a Reading Comprehension question from the Verbal Final Challenge. So far, 53.1% of Knewton students have missed it. How would you approach it? (Stay tuned for another question from the same passage.) Try it out, then share your answers, questions, and thought processes in the comments below. Remember, if you’re in our GMAT class now, add your teacher name and session to your comment (e.g., Zwelling, MW 1:30). Update: When you have your answer,… Read more

Posted in Challenge Discussions, GMAT, Verbal Guide | 25 comments



Here’s a tough Problem Solving question from Session 11′s QC homework. So far, 69.8% of students have missed it. How would you solve it? Give it a shot, then share your answers, questions, and thought processes in the comments below. Remember, if you’re in our GMAT class now, add your teacher name and session to your comment (e.g., Zwelling, MW 1:30). A certain music store stocks 800 cellos and 600 violas. Of these instruments, there are… Read more

Posted in Challenge Discussions, GMAT, Quant Guide | 17 comments



Here’s a tough Critical Reasoning question from CR2, Extra Practice HW1 (Assumptions). So far, 67.6% of students have missed it. How would you solve it? Give it a shot, then share your answers, questions, and thought processes in the comments below. Remember, if you’re in our GMAT class now, add your teacher name and session to your comment (e.g., Zwelling, MW 1:30). Update: When you’re ready to see the answer, check out Rich’s video explanation below! A… Read more

Posted in Challenge Discussions, GMAT, Verbal Guide | 116 comments



This is a Data Sufficiency problem from Session 5, Extra Practice HW 3 (Quantitative Strategy). So far, 49.6% of Knewton students have missed it. How would you approach it? Try it out, then share your answers, questions, and thought processes in the comments below. Remember, if you’re in our GMAT class now, add your teacher name and session to your comment (e.g., Zwelling, MW 1:30). In 2001, Rembolse Insurance sold 8,250 travel insurance policies in its… Read more

Posted in Challenge Discussions, GMAT, Quant Guide | 100 comments



This is a Sentence Correction question from SC 3, Extra Practice HW (Parallelism and Comparisons). So far, almost 45% of Knewton students have missed it. How would you approach it? Try it out, then share your answers, questions, and thought processes in the comments below. Remember, if you’re in our GMAT class now, add your teacher name and session to your comment (e.g., Zwelling, MW 1:30). In addition to relieving stress and building strength, certain yoga poses instigate… Read more

Posted in Challenge Discussions, GMAT, Verbal Guide | 24 comments



This Data Sufficiency question, from Session 4, Extra Practice HW 3 (Sets and Rates), has stumped 50% of Knewton students so far. How would you tackle it? Give it a shot, then share your answers, questions, and thought processes in the comments below. If you’re in our GMAT class now, don’t forget to add your teacher name and session (e.g., Zwelling, MW 1:30)! 7/8 of the students at Edgemont High play a sport in the… Read more

Posted in Challenge Discussions, GMAT, Quant Guide | 53 comments