Compute the sums

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 Compute:

1) 1 + 2 + 3 + 4 + 5 + 6 + 7 + 8 ....... + 99 + 100

2) 5 + 10 + 15 + 20 + 25 + ...... + 495 + 500


Comments

  1. Anonymous27 May 2021 at 06:16

    You can use the formula (n*(n+1))/2 to get:

    1) 5050

    2) For this one you can make it 5(1 + 2 + 3 + 4 + 5 + 6 + 7.... + 98 + 99 + 100)
    This would be 5(5050) = 25250

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