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Sunshine91

  • 4 years ago

A grocery clerk sets up a display of oranges in the form of a triangle using 10 oranges at the base and 1 at the top (Only part of the display is shown.). How many oranges are there in the display?

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  1. Sunshine91
    • 4 years ago
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    I cannot figure this out!

  2. m_charron2
    • 4 years ago
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    That sounds like a challenge to my drawing skillz! |dw:1334770485786:dw| ok, I skipped a few rows, but you can get the pattern I think from this

  3. sheg
    • 4 years ago
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    55

  4. Sunshine91
    • 4 years ago
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    Thank you guys!!

  5. alexwee123
    • 4 years ago
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    (1 + N)*(N/2)

  6. sheg
    • 4 years ago
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    10 + 9 + 8 + 7+6+5+4+3+2+1 = (10*11)/2= 110/2 = 55

  7. Dyiliq
    • 4 years ago
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    preez no direct answers.....but the steps are very helpful. @sheg

  8. sheg
    • 4 years ago
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    i had provided the step @ Dyiliq

  9. sheg
    • 4 years ago
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    it is in arithmetic progression

  10. Dyiliq
    • 4 years ago
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    I know, thanks for that :^]

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