20 is 0.25% of?

If a vendor sells a coconut at Rs 24 he makes 20% loss. If he sells at Rs 36 then what is his profit percentage?

The average cost of 4 items in a shopping list is Rs 1,250. If one more item whose cost is Rs 2,000 is added to the list what will be the new average (in
Rs)?

If A = 2B = 4C; what is the value of A : B : C?

If the selling price of an item is Rs 1000 after getting a discount of 20%, then what was the marked price (in Rs)?

What is the area (in sq cm) of a rectangle of perimeter 48 cm and breadth 10 cm?

If A and B together do a job in 7.5 days and if A could do the job in 10 days if he worked alone. How many days would B take to do the job if he worked alone?

What is the largest 4 digit number which is exactly divisible by 81?