5. GRE Lesson: General GRE Math Strategies

[@TheAngryChoob]

You make it look easy.

[@GreenlightTestPrep]

TheAngryChoob thanks!

[@walaaslam9839]

Thank you 🌹

[@GreenlightTestPrep]

You're welcome :-)

[@brittanycassar6706]

Thank you!!!!!!!

[@Me_out_of_office]

Thank you

[@GreenlightTestPrep]

you're welcome!

[@JCDraco92]

quite useful, thanks!

[@GreenlightTestPrep]

Julio César EA Thanks!

[@gilleyandbrianshow]

I'm confused on the last problem. How do we know that there are 21 pairs that add to 65? Why is 53-12 relevant, and why does y-x+1 factor in?

[@GreenlightTestPrep]

Once we know that we can rewrite the sum as a bunch 65's, we need to determine how many 65's there are to add. We do that using the formula y-x+1. For more on this, see the following video - www.greenlighttestprep.com/module/gre-word-problems/video/930 NOTE: that question is part of a very general video on math strategies. We take a closer look at the sum question in much greater detail later on in the course.

[@21D70F2D]

you are my god. i love you man.

[@bechouabderrazak5654]

there is only one god.

[@arjuthecooldude]

Hello, while using GRE calculator, all numerics can be input via keyboard, but while giving multiplication 'x' sign through '*' asterisk mark it is not taking, can you please tell me how can I put multiplication using keyboard?

[@abidsaleem9003]

at the end from where 21 comes????????????????

[@GreenlightTestPrep]

Once we know that we can rewrite the sum as a bunch 65's, we need to determine how many 65's there are to add. We do that using the formula y-x+1. For more on this, see the following video - www.greenlighttestprep.com/module/gre-word-problems/video/930

[@matthewfales4540]

I also had this question. One way that I tried to think about it is that there are not 42 pairs of 65's. There are only 21 (12+53=65; 13+52=65; 14+51=65; etc.). There are only 21 pairs of 65's. I had to write it down in my own words for it to make sense.