Sum to n terms of an Arithmetic progression is 2n²+n then eighth term is

What should come in place of the question mark in the following series

24, 536, 487, 703, 678, ?

Simplify : (1350÷15-5) ÷ (47.5-15×2.5)

Sasi purchased a house for INR 27,75,000 and spent INR 2,25,000 on its interior decoration. He sold the house to make a profit of 40%. What is the selling price of the house

Simplify : x+3/x³-1+3x+9/x²+x+1

Surface Area of a hemisphere is 2772 cm² then the total surface area of hemisphere is