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Lê Anh Duy

11/03/2018 at 13:03
Answers
2
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Everyday (starting from question 1) I will post 1 - 2 question(s) to get a point:

- The fastest person who answer correctly will get 1 point/question/answer

- You can still answer my old question at https://e-learning.codienhanoi.edu.vn/discuss/member/leanhduy0206 and get point

THE QUESTION TODAY IS:

1) The odd numbers is sorted into rows below:

1

3     5

7     9     11

13     15     17    19    

21     23     25     27     29

...       ...      ...      ...      ...     ...     ...

What is the sum of the numbers in row 20?

(MYTS - 2018 - Grade 7)

 

 



    List of answers
  • ...
    Lê Quốc Trần Anh Coordinator 11/03/2018 at 13:26

    We have: 

    - row 1 = \(1^3=1\) 

    - row 2 = \(2^3=8\) 

    - row 3 = \(3^3=27\) 

    ...........

    - row 20 = \(20^3=8000\) 

    So the answer is 8000.

    Lê Anh Duy selected this answer.
  • ...
    Ma Kết 11/03/2018 at 13:21

    1) The odd numbers is sorted into rows below:

    1

    3     5

    7     9     11

    13     15     17    19    

    21     23     25     27     29

    ...       ...      ...      ...      ...     ...     ...

    What is the sum of the numbers in row 20?

    (MYTS - 2018 - Grade 7)



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