Question

explain me the meaning and answer of this question:

find the result of subtracting the sum of all integers between 20 and 30 from the sum of all integers from 20 to 30

Answer 1

First set is between 20 and 30 so we don't count 20 and 30

Whereas the second set is from 20 till 30

When we know this we need not calculate the sum as the difference is just the numbers not taken in consideration in first case that is 30 and 20

Hence the required answer is 20+30=50

Answer 2

hey mate i

in this ques they said do the sum of integers b/w 20 and 30 means 20 and 30 are not not included only do sum of 21 ,22,23,24,25,26,27,28 and 29

and in 2nd situation they said do sum from 20 and 30
means 20 and 30 is added
now do summ of first situation and subtra f it from 2nd situation.


Hope it helps u