All about flooble | fun stuff | Get a free chatterbox | Free JavaScript | Avatars    
perplexus dot info

Home > Just Math
Mental Cube Root (Posted on 2004-03-10) Difficulty: 2 of 5
If the cube root of 1331 is 11 and the cube root of 1728 is 12, what is the cube root of 1442897?

(Do this one in your head - no writing or calculators allowed!)

  Submitted by Gamer    
Rating: 2.6667 (9 votes)
Solution: (Hide)
Based on the information given, we can conclude the cube root of 1331000 is 110 and the cube root of 1728000 is 120. 1442897 is between these two. Since something ending with a 3 is the only thing which gives something ending in a 7 when cubed, the answer must be 113.

Comments: ( You must be logged in to post comments.)
  Subject Author Date
SolutionSolution to the ProblemK Sengupta2007-03-09 05:13:08
Some ThoughtsNo Subjectpaul2004-03-25 21:48:38
re: solutionRohan Shah2004-03-14 07:02:34
solutionmark hartman2004-03-11 18:51:05
Solution2 EZAdy TZIDON2004-03-10 14:59:04
SolutionMy guessBryan2004-03-10 14:51:20
Please log in:
Remember me:
Sign up! | Forgot password

Search body:
Forums (0)
Newest Problems
Random Problem
FAQ | About This Site
Site Statistics
New Comments (3)
Unsolved Problems
Top Rated Problems
This month's top
Most Commented On

Copyright © 2002 - 2018 by Animus Pactum Consulting. All rights reserved. Privacy Information