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by DanielleT248
Wed Feb 24, 2021 6:50 pm
 
Forum: Manhattan Prep GMAT Non-CAT Math
Topic: Add or subtract the following fractions. FoM Ch 4 Drill 16
Replies: 4
Views: 279
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Add or subtract the following fractions. FoM Ch 4 Drill 16

Add or subtract the following fractions. Put answers in their most simplified form. 24 / 3√2 - 4 / √2 A) 2√2 B) 4 C) 8√2 The answer is A. I follow the explanation given in the book for how they arrived at that answer, but I am having trouble understanding where I went wrong in my calculation. I keep...
by DanielleT248
Sat Feb 27, 2021 7:36 pm
 
Forum: Manhattan Prep GMAT Non-CAT Math
Topic: Add or subtract the following fractions. FoM Ch 4 Drill 16
Replies: 4
Views: 279
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Re: Add or subtract the following fractions. FoM Ch 4 Drill 16

I finally figured this out after spending more time on roots and exponents then coming back to this problem. My answer of 4 / √2 is equivalent to the correct answer of 2√2 after I multiply 4 / √2 by √2 / √2 to get rid of the root in the denominator. I thought I was having an issue with my calculatio...
by DanielleT248
Wed Mar 03, 2021 8:49 pm
 
Forum: Manhattan Prep GMAT Non-CAT Math
Topic: Add or subtract the following fractions. FoM Ch 4 Drill 16
Replies: 4
Views: 279
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Re: Add or subtract the following fractions. FoM Ch 4 Drill 16

Thank you! Yes, it was a typing error in my initial post. :)
by DanielleT248
Wed Mar 03, 2021 8:56 pm
 
Forum: Manhattan Prep GMAT Non-CAT Math
Topic: FoM Ch 3 Drill 47 Simplify the following roots
Replies: 1
Views: 228
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FoM Ch 3 Drill 47 Simplify the following roots

Exponents and roots are my sworn enemy, but I'm determined to figure them out. Okay, once again I can follow the correct answer, but I am having trouble figuring out why my answer is wrong. Simplify √2^9 + 2^7 - 2^6. The book factors out 2^6 first then gets √2^6(3^2) then 2^3 x 3 = 8 x 3 = 24. I fol...