Find the sum `2+5+10+17+26+. . . .`

Find the sum of i] 41, 36, 31, ....... upto 10 terms ii] -26, -24, -22, ..... upto 36 terms.

find the next term in the series 2, 5, 10, 17, 26, 37, 50

Find the sum 5+17+29+41 ......upto 20th term.

Find the n^(th) term of the series 2 + 5 + 10 + 17 + 26 + …

Find the sum of 25 + (-21) + (-20) + (+17) + (-1)

Find the sum of 25 + (-21) + (-20) + (+17) + (-1)

Find the missing number : 2, 5, 10, 17, 26, ?

Which number will replace the question mark (?) in the following series? 2, 5, 10, 17, 26, 37, ?, 65, 82, 101

Find the sum of an A.P. of :- 26 terms whose nth term is 2n + 5.

Find the sum of the 10 terms of the following series -11, -8, -5, -2…….