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clamin

  • one year ago

The 99th pyramidal number is 328,350. That would make quite a stack of basketballs! What number must you add to 328,350 to get the 100th pyramidal number? a. 100 b. 328,350 c. 10,000 d. 55 e. 1000

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  1. FibonacciChick666
    • one year ago
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    What have you tried?

  2. clamin
    • one year ago
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    Im actually confuse of this question because theres no number of 100th

  3. FibonacciChick666
    • one year ago
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    Well, you have a formula to calculate pyramidal numbers right?

  4. clamin
    • one year ago
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    Im not sure

  5. FibonacciChick666
    • one year ago
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    ok, let's start with, what is a pyramidal number?

  6. clamin
    • one year ago
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    328,350

  7. FibonacciChick666
    • one year ago
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    no, my bad, I mean, what is the definition of a pyramidal number?

  8. clamin
    • one year ago
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    Pyramidal sequence isna sequence of numbers that are the sum of perfect squares.

  9. FibonacciChick666
    • one year ago
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    ok, that is a version. check out this one, specifically look at the picture to get an understanding of the concept in 3D http://mathworld.wolfram.com/SquarePyramidalNumber.html

  10. clamin
    • one year ago
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    I cant open it I thibk its becuase im only using my phone

  11. FibonacciChick666
    • one year ago
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    ok, well if you can, google "wolfram square pyramidal number"

  12. FibonacciChick666
    • one year ago
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    it will make a lot more sense if you can visualize this concept

  13. inkyvoyd
    • one year ago
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    hint: pyramidal numbers are formed by adding consecutive perfect squares. as in 1+4+9+16+25+36+... That should be enough to get you to the answer.

  14. clamin
    • one year ago
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    is it 100

  15. clamin
    • one year ago
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    @inkyvoyd

  16. FibonacciChick666
    • one year ago
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    not 100

  17. clamin
    • one year ago
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    10,000

  18. FibonacciChick666
    • one year ago
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    maybe take a look at one of the other questions on this you posted before for the sequence

  19. FibonacciChick666
    • one year ago
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    and yes. 100^2

  20. inkyvoyd
    • one year ago
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    1+4+9+16+25+36+... \(1+2^2+3^2+4^2+5^2+6^2+...+99^2+100^2\)

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