Question

without actual addition, find the sum of the following
1+3+5+7+9+11​

Answer 1

Step-by-step explanation:

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Answer 2

Answer: 36

Step-by-step explanation:

The numbers are in Arithmetic Progression

Here,

1st term (a) = 1

last term (L) = 11

number of terms ( n) = 6

SO,  

⇒Sum of series = n/2 ( a + L)

                            = 6/2 ( 1 + 11)

                            = 3 * 12

                            = 36

Thus, sum is 36