`856, 642,725,511,594,_`find the next tem

16,54,195,? find the next term in the series

For an arithmetic progression, first term is -7 and the last tem is 53. If the sum of all the term is 483, then find the number of terms and the common difference.

If x=1/3, find the greatest tem in the expansion of (1+4x)^(8)

The length of a rope is 23.25 m. If two piece s of lengths 6.42 m and 3.09 m are cut, then find the length of the remaining rope.