Simplification the following equations

Direction (66-70): What should come in place of the question mark(?) in the following number series?

8, 39, 155, 464, ?

If the selling price of a shirt is reduced from 440 to ₹410, the loss increases by 4%. What is the cost price of the shirt?

Rs.4000 becomes Rs. 5000 in 4 years at a certain rate of compound interest. What will be the sum at the end of 12 years?

The three vertices of a parallelogram taken in order are (0, 1), (2, 3) and (4, 3) respectively, then the coordinates of the fourth vertex is – 

A, B and C gets a total wage of Rs.3600 if they work together. A and B gets a total wage of Rs. 2800 if they work together and A alone gets Rs.1600. Find the efficiency ratio of A, B and C  

An interval of 3 hours 40 minutes is wrongly estimated as 3 hours 45.5 minutes. The error percentage is  

Divided ₹ 1250 among A, B, C so that A gets   $$ {2\over9}$$ of B’s share and C gets   $${3\over4}$$ of A’s share,