For an AP the first term is -1 the common difference is -1 and the term is -11. Which of the following numbers represents the value of n?

The number of terms in the series 11, 15, 19, __________ , 211 is

The sum of the first 5 terms of an AP is -205 and its common difference is -15 . Which of the following values is the first term of the AP? 

If the last term,  the number of terms and the sum of all the terms of an AP are 68, 20 and 790 respectively,  its first term is ___________

For an AP ,the first term and the common difference are -3 and -2, respectively. The 19th term of the AP is _________

Which of the following pairs represents the first term 'a' and common difference 'd' of AP :  9, 12, 15, 18, 21, 24, ____?

Which of the following pairs represents the first term 'a' and common difference 'd' of AP : - 20, -14 , -8 , -2 , 4 ?

Which of the following values is the sum of the AP : 7,11,15,.........59?

Two AP's 45, 41, 37, ______________ and 5, 9, 13, ____________ have their kth terms same. Find the value of k.

Find the 14th term of an AP whose first trem  x+2 and sum of 14 terms is 42x-14

Find the term of the AP - 40, - 18, 4, 26, ......

The sum of the first 7 terms of an AP is 126 and its common difference is 15 . Which of the following values is the first term of the AP?

If the sum of 3 consecutive terms of an AP is zero and what will be their product ?

One of the following statement is true. Identify the statement.

If the sum of first 15 terms of an AP is zero, then sum of first 5 terms will be same as the sum of first _________