The common difference of a constant A.P. is ……

a_(28)-a_(23) = 15 , then the common difference of the A.P. is

If every term of an A.P. is multiplied by 3, then the common difference of the new A.P. is …..

If the common difference of an A.P. is 3, then a_20 - a_15 is

The 8^(th) term of an A.P is 17 and its 14^(th) term is 29 . The common difference of the A.P. is

The standard deviation of four consecutive numbers in A.P. is sqrt5 . The common difference of A.P. is ………

The common difference of an A.P. 6, then a_(15) - a_(11) …….. .