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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
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