The 7<sup>th</sup> and 21<sup>st</sup> terms of an AP are 6 and -22 respectively. Find the 26&lt…

Which term of the A.P. 24, 21, 18, ............ is the first negative term?

If four numbers in A.P. are such that their sum is 50 and the greatest number is 4 times the least, then the numbers are

The first three terms of an A.P. respectively are 3y – 1, 3y + 5 and 5y + 1. Then, y equals

In an AP, S<sub>p</sub> = q, S<sub>q</sub> = p and S denotes the sum of first r terms. Then, S&l…

The sum of first five multiples of 3 is:

The next term of the A.P., $$\sqrt 7 ,$$ $$\sqrt {28} ,$$ $$\sqrt {63} ,$$ . . . . . .

For an A.P. if a<sub>25</sub> - a<sub>20</sub> = 45, then d equals to: