Question

1+2+3+4+5+6+7+8+9+10=?​

Answer 1

Answer:

55

Step-by-step explanation:

Sum = (n+1)n/2

= 10x11/2

= 55

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Answer 2

Answer :- 55

given :-

1+2+3+4+5+6+7+8+9+10= sum of first 10 number

now ,

sum of n natural number = n(n+1)/2

=> sum of first 10 number = 10( 10 + 1) / 2

=> sum = 55