1! + 2! + 3! + 4! + ......... + 50! Find the unit digit of?

What would be the simple interest obtained on an amount of `6,535 at the rate of 10 % p.a. (percent per annum) after 6 years?

Compute the compound interest on ₹ 8,400 for one and half years at 12% rate of interest per annum, compounded half yearly.

The volume of a cone is $${27720cm^2}$$. If the height of the cone is 20 cm, then what will be the area of the base?

If 20% of (A+B) = 50% of B, then Value of $${2A-B}\over {2A+B}$$ is 

The distance between two points A and B is covered in $$ {5{1\over 2}\ hours}$$ at a speed of 50 km/hr. If the speed in increased by 5km/hr, how much time would be saved?

An amount of Rs.56,742 is divided between P and Q in the ratio of 19 : 23. What is the difference between thrice the share of P and twice the share of Q?

The average of two numbers is 62. If 2 is added to the smaller number, the ratio of the numbers becomes 1 : 2. What is the difference between numbers?