find the sum of 10 terms of AP "4+8+12+...."

Find the sum of: 10 terms of 5 +8 + 11+ ....,

Find the sum to 8 terms of 3 + 6 + 12 + ...

Find the sum of 20 terms of the AP 1, 4, 7, 10,....

Find the sum of 50 terms of the A.P. 1 + 4 + 7 + ....

Find the sum of 10 terms of the G.P. 3, 6, 12,...

Find the sum of terms of the A.P: 4, 9, 14,…., 89.

Find the sum of last ten terms of the AP 8 , 10 , 12 , …, 126 .

Find the sum of first 10 terms of the A.P. 4+6+8+………

Find the sum of 20 terms of the A.P. 1,4,7,10…..

The first term of an AP is - 5 and the last term is 45 . If the sum of the terms of the AP is 120 , then find the number of terms and the common difference.