Direction: what should come in place at question mark(?).

45% of 224×?% of 120=8104.32

Interest earned by Ramesh on Rs.10,000 for 2 years at R% p.a. simple interest is how much more/less than interest earned by him on Rs. 8000 for 2 years at (R+10)% p.a. compounding annually. If Rs. 2000 is invested at 2R% p.a. simple interest for a year, then it would fetch an interest of Rs.400.

If all three pipes are opened for 2 minutes to fill the tank each alternatively in the sequence of A then C and then B.  Calculate water filled by pipes A is what % of water filled by pipe C?

If efficiency of B increased by $$ {33{1\over 3}{\%}}$$ and A and B start work together, while at the same time C starts destroying the work. Find in how many days work will be completed?

Let N be the greatest number that will divide 1305, 4665 and 6905, leaving the same remainder in each case. Then sum of the digits in N is:

How many bricks, each measuring 25 cm x 11.25 cm x 6 cm, will be needed to build a wall of 8 m x 6 m x 22.5 cm?

The curved surface area of a cylindrical pillar is $$ {264 m^{2}}$$ and its volume is $$ {924 m^{3}}$$. Find the ratio of its diameter to its height.

The difference between simple interest and compound on Rs. 1200 for one year at 10% per annum reckoned half-yearly is: