An arithmetic sequence formed of 11 terms, and the sum of all its terms equals to 220. Find the middle term in that sequence.
For an A.P with odd number of terms
Sum of A.P. == (number of terms)*(middle term)
=== 220 = 11*(middle term)
middle term = 20
find the middle term of the sequence formed by all three digits numbers which leave a reminder 3, when divided by 4. Also find the sum of all numbers on both sides of the middle term separately.
Sum of first 13 terms of an arithmetic progression is 312. What is the sum of the first 14 terms, if the first term and the common difference are positive integers?
