Sunshine91
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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Sunshine91
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I cannot figure this out!
m_charron2
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That sounds like a challenge to my drawing skillz!
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ok, I skipped a few rows, but you can get the pattern I think from this
sheg
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55
Sunshine91
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Thank you guys!!
alexwee123
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(1 + N)*(N/2)
sheg
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10 + 9 + 8 + 7+6+5+4+3+2+1 = (10*11)/2= 110/2 = 55
Dyiliq
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preez no direct answers.....but the steps are very helpful. @sheg
sheg
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i had provided the step @ Dyiliq
sheg
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it is in arithmetic progression
Dyiliq
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I know, thanks for that :^]