Andrew Geller

Andrew Geller is a top GMAT tutor based out of New York City. Throughout his career he has successfully taught people from many different backgrounds, countries, and starting scores.

99999999 GMAT Puzzle

(0.99999999/1.0001)−(0.99999991)/1.0003 =

(0.99999999/1.0001) − (0.99999991)/1.0003 GMAT Explanation, Video Solution, and Additional Practice! (0.99999999/1.0001) − (0.99999991)/(1.0003) = (A) 10^(−8) (B) 3∗10^(−8) (C) 3∗10^(−4) (D) 2∗10^(−4) (E) 10^(−4) Give it a shot on your own and then you can reference the explanation and video solution. Good luck! This is a tough GMAT exponents puzzle from the GMAT Official Guide. […]

(0.99999999/1.0001)−(0.99999991)/1.0003 = Read the Full Article »

A researcher plans to identify each participant in a certain medical experiment with a code consisting of either a single letter or a pair of distinct letters written in alphabetical order. What is the least number of letters that can be used if there are 12 participants, and each participant is to receive a different code? GMAT Explanation, Video Solution, and Additional Practice Questions!

A researcher plans to identify each participant in a certain medical experiment with a code consisting of either a single letter or a pair of distinct letters written in alphabetical order. What is the least number of letters that can be used if there are 12 participants, and each participant is to receive a different

A researcher plans to identify each participant in a certain medical experiment with a code consisting of either a single letter or a pair of distinct letters written in alphabetical order. What is the least number of letters that can be used if there are 12 participants, and each participant is to receive a different code? GMAT Explanation, Video Solution, and Additional Practice Questions! Read the Full Article »