## How do you calculate 1+2+3+4+5+6+7+8+9+10 quickly?

**Puzzle answer: **How can you lift an elephant with one hand?

Iāll tell you one trickā¦which will give you an answer within 1 secondā¦

;

;

just take a calculatorā¦ š

Ha ha haā¦Just kidding!!!

Already there are some brilliant ways people have solved this problemā¦but I’ll tell you how did I approach when I saw this problem at very first glanceā¦

##### Show answer

**Answer : 55**

The series ā1+2+3+4+5+6+7+8+9+10ā can be considered as the sum of the first 10 Natural numbers.

The generalized formula to find the sum of first N natural numbers is

(N * (N + 1) ) /2

For the series given, the value of N is 10

So substituting value of N in the generalized formula

( 10 * (10 + 1) ) / 2

= (10 * 11 ) / 2

= 110/2

Correct answer = 55

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