Find the following sums :
1+2+3+ ..... + 100

Find the sum of the following APs : 0.6, 1.7, 2.8, … , to 100 terms

Find the sum of the following Aps: (i) 2, 7, 12, …….., to 10 terms. (ii) -37, -33, -29, …….., to 12 terms. (iii) 0.6, 1.7, 2.8,….., to 100 terms (iv) (1)/(15), (1)/(12),(1)/(10) ,……,to 11 terms

Find the sum: i] 28 + 31 + ·········· + 100 ii] 28 + 26 + ·········· + 10 . iii] 3 + 11 + 19 + ......+ +803 .

Find the sum of the following Aps, (i) 2,7,12,…..to 10 terms. (ii) -37, -33, -29 , to 12 terms (iii) 0.6, 1.7, 2.8,…… to 100 terms (iv) 1/15, 1/12, 1/10 , ………….. To 11 terms.

Find the sum of the following APs : 2,7,12,…to 10^(th) terms.

Find the sum of the following APs : (1)/(15), (1)/(12), (1)/(10),.. , to 11 terms