Question

$1 + 2 + 3 + 4 + 5 + 6 + 7 + 8 + 9 + 10 + ............ + 100 =$


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Answer 1

Here's your answer....

There's a trick behind this sum...

Which is

$sum \: of \: n \: consecutive \: numbers \: = \frac{ {n}^{2} + n}{2}$

Therefore:

1 + 2 + 3 + 4 + 5 + 6 + 7 + 8 + 9 + 10 + ............ + 100 =

$\: \: \: \: \: \: \frac{ {100}^{2} + 100}{2} \\ \\ = \frac{10000 + 100}{2} \\ \\ = \frac{10100}{2 } \: \: \: \: \: \: \: \: \: \: \: \: \: \: \\ \\ = 5050 \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \:$

Thanku....

Answer 2

Answer:

$1 + 2 + 3 + 4 + 5 + 6 + 7 + 8 + 9 + 10 + ............ + 100 = 4284$

Step-by-step explanation:

Hope this will help

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