find the sum of natural numbers from 21 to 50
Answers
Answer:
994 is the answer without adding 21 and 50.
With 21 and 50 your answer will be 1065.
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Given: Natural numbers ranging from 21 to 50
To find: Sum of these numbers
Explanation: The sum of natural numbers from 1 to some natural number n is given by the formula: n(n+1)/2.
Sum of natural numbers from 21 to 50 can be found by: Sum of 1 to 50- Sum of 1 to 20
Sum of 1 to 50= n(n+1)/2 where n= 50
= 50*51/2
= 25*51
= 1275
Sum of 1 to 20 = n(n+1)/2 where n = 20
= 20*21/2
= 10*21
= 210
Therefore, sum of natural numbers from 21 to 50 = 1275-210
= 1065
Therefore, the sum of natural numbers between 21 to 50 is 1065.