... square? (A) 256 (B) π2256 − Maths Problems practice for GRE, GMAT & SAT Copyright by Hp Group (www.hp-vietnam.com). TOEFL, IELTS, GRE, GMAT, … Problems practice This file contains ... (40+32) = 24/72 = 1/3 hour, which is 20 minutes and so the best answer is D. Maths Problems practice for GRE, GMAT & SAT by Hp Group (www.hp-vietnam.com). TOEFL, IELTS, GRE, ... does it take him to eat half a cheeseburger? (A) 4 minutes (B) 6 minutes (C) 12 minutes Maths Problems practice for GRE, GMAT & SAT by Hp Group (www.hp-vietnam.com). TOEFL, IELTS, GRE,...