Tuesday, 17 January 2017

Finding Cube Root... What's wrong with this working?

Question: Find the cube root of 13824

Read the working carefully.
  • Highlight area(s) that you think is incomplete
  • Identify an 'critical' mistake - because of the way the working is presented

31 comments:

  1. Replies
    1. He should write it as cube root of 13824 = 24

      Delete
  2. 24 x 24 x 24 is not equal to 24

    ReplyDelete
    Replies
    1. He did not include the cube root sign

      Delete
  3. 24*24*24 is not equal to 24, he should put Cube root of 13824=24

    ReplyDelete
    Replies
    1. He should finish the prime factorisation with 1

      Delete
  4. In lines 3 and 4, 24*24*24 is not equal to 24.

    ReplyDelete
  5. he didn't complete the factorisation
    24x28x24 dosent equal to 24

    ReplyDelete
  6. not systematic. cannot red what is written the end product of the prime factorisation is not 1 but 3 and 13824 is not 24

    ReplyDelete
  7. he did not put the square root in the 13824

    ReplyDelete
  8. He did not use the cube root so by reading his working it only tells me that 24 x 24 x 24=24 which is wrong

    ReplyDelete
  9. Replies
    1. He did not end of the factorization completely

      Delete
  10. he forgot to put the square root before his answer

    ReplyDelete
  11. In line 4, it should be cube root 13824=24 as 13824 is not equal to 24

    ReplyDelete
  12. 24x24x24 is not equal to 24 as 24 is the square root of 13824

    ReplyDelete
  13. 24x24x24 is not equal to 24.

    ReplyDelete
  14. he did not complete the prime factorisation and 24 x 24 x24 is not equal to 24

    ReplyDelete
  15. It says that 24x24x24
    = 24
    Which is incorrect

    ReplyDelete
  16. Critical mistake:
    Line 4 is incorrect as 24*24*24 is not equal to 24. The person must put the cube root in front.

    ReplyDelete
  17. In line 3, 24 x 24 x 24 and then in line 4, he put it to be equal as 24 which is wrong

    ReplyDelete
  18. 13824 is not equal to 24 and 24 to the power of 3 is not equal to 24.

    ReplyDelete
  19. 24x24x24does not produce the number 24

    ReplyDelete
  20. For his working, he wrote: 24 x 24 x 24=24, which is wrong.

    ReplyDelete
  21. In Lines 3 & 4, his working states 24x24x24=24, which is wrong

    ReplyDelete

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