Question

13)The odd natural numbers have been
divided in groups as
(1,3):(5,7,9,11);(13,15,17,19,21,23);...... Then
the sum of numbers in the 10th group is:
divide your answer by 1000.
cana​

Answer 1

Each group has a difference of 2 elements. 10th group has 20 elements. After adding all the elements we get 4000. As asked we have to divide it by 1000. So 4000÷1000=4. So the answer is equal to 4.