GMAT math thinking skills 7

You will encounter word problems like this in the GMAT.

Most of you will write equations and solve this sum. 

That approach takes a lot of time.   

I am now going to show you, two ways to solve this sum

Method 1 :  The traditional approach

This approach takes time, for those, who are not comfortable with math.

You are also prone to calculation errors.

Method 2: Substitution of numbers

This approach is a lot faster.

You can save lots of time, If you use numbers instead of variables like X and Y. You can use this approach to solve various types of sums, from different areas.

 

Let’s choose numbers such that k is greater than m.

 Lets put P =100 and E = 10 . You can choose any number…

Hence option D is correct.

If there are many variables, use method 2 to arrive at the answer faster. 

Do you want to try another question in this series.

Give it a shot

 

Solution is here : http://letsgmat.blogspot.com/2020/09/gmat-math-thinking-skills-6.html

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