find the sum of all natural numbers 11 to 121 including them. solve by formula
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Let us take the starting number as ' x '
Then, the next number would be x + 2
The next number would be x + 4
Fourth number = x + 6
Fifth number = x + 8
sixth number = x + 10
Seventh number = x + 12
Eight number = x + 14
Ninth number = x + 16
Tenth number = x + 18
Eleventh number = x + 20
If we add them all, we get 121
11 x + 110 = 121
11 x = 11
x = 1
First number = 1
second = 3
Numbers are =
1 , 3 , 5 , 7 , 9 , 11 , 13 , 15 , 17 , 19 , 21
Let us take the starting number as ' x '
Then, the next number would be x + 2
The next number would be x + 4
Fourth number = x + 6
Fifth number = x + 8
sixth number = x + 10
Seventh number = x + 12
Eight number = x + 14
Ninth number = x + 16
Tenth number = x + 18
Eleventh number = x + 20
If we add them all, we get 121
11 x + 110 = 121
11 x = 11
x = 1
First number = 1
second = 3
Numbers are =
1 , 3 , 5 , 7 , 9 , 11 , 13 , 15 , 17 , 19 , 21
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