Find the sum 3 + 33 + 333 + ….. Upto n term.

Find the sum 8 + 88 + 888 + ….. Upto n term.

Find the sum 2^2 + 4^2 + 6^2 + 8^2 …… upto to n terms.

Find the sum 5 xx 7 + 9 xx 11 + 11 xx 3 + ... upto n terms.

If (1xx3 + 2xx5 + 3xx7 + ….. upto n terms) / ( 1^3 + 2^3 + 3^3 + …… upto n terms) = 5/9, find the value of n.

Find 2 + 22 + 222 + 2222 ……. Upto n terms

Find 1^2/1 + (1^2 + 2^2) / 2 + (1^2 + 2^2 + 3^2) / 3 + …..upto n terms.