Mathematics

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yashvardhan: Newbie | Next Rank: 10 Posts; Posts: 1; Joined: Thu May 05, 2016 4:00 am

by yashvardhan » Thu May 05, 2016 4:07 am

I need help in finding the cube root of 36.12..Can someone please solve this for me in detail..Thanks..somewhere it is given that it's cube root will be 3.306 but how..Can anyone explain this please..Thanks..

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Source: Beat The GMAT — Problem Solving | Thu May 05, 2016 4:07 am

DavidG@VeritasPrep: Legendary Member; Posts: 2663; Joined: Wed Jan 14, 2015 8:25 amFollowed by: 128 members; Location: Boston, MA; Thanked: 1153 times; GMAT Score:770

by DavidG@VeritasPrep » Thu May 05, 2016 4:28 am

yashvardhan wrote:I need help in finding the cube root of 36.12..Can someone please solve this for me in detail..Thanks..somewhere it is given that it's cube root will be 3.306 but how..Can anyone explain this please..Thanks..

You'd never have to calculate anything with that level of precision on the GMAT. But here's one way to think about it:

3^3 = 27; So the cube root of 27 is 3
4^3 = 64; So the cube root of 64 is 4

Logically, it follows that the cube root of 36 will be between 3 and 4.

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