sum fun (math)

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find a quick and easy method to compute the sum of the first 100 counting numbers (no calculators allowed)

• sum fun (math) -

Like Gauss did it?

1 + 100 = 101
2 + 99 = 101
3 + 98 = 101
.
.
.
50 + 51 = 101

get it ?

• sum fun (math) -

234

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