Number of terms between 100 and 300 which are divisible by 6 is

If 103 is the first term of an AP and -22 is the common difference then the second term is

If the common difference of an A.P is d, then a₃ - a₁ equal to

The n^th term of the sequence 3, 6, 9.... is 

The number of odd integers between 8 and 80 is 

The middle term of the AP 1, 8, 15....... 505 is

Sum of first 11 terms of an AP is 220. Then the 6^th term is  

Compute 1 + 2 + 3 + 4 + ...... + 100.

Which term of the A.P 21, 18, 15, ..... is 0?

n^th term of a sequence is a + nb. Find a₄ - a₃.