Find the present value of a perpetuity of rs 18,000 payable at the end of 6 months, if the money is worth 8% p.a. compounded semi-annually.

just plug your numbers into the usual PV formula.

Also, I don't see where you have mentioned the discount rate.

@oobleck

8% p.a. compounded semi-annually is discounted rate

You just want the amount of money which will generate 18,000

at 4% each half year,
that is simply
PV(.04) = 18,000
PV = 450,000

that is, 4% of 450,000 = 18,000, pay it out as a scholarship or whatever,
gets you back to 450,000, another half year ---> 18,000 "perpetually" etc

To find the present value of a perpetuity, we need to use the formula for the present value of a perpetuity:

PV = PMT / r

Where:
PV = Present Value
PMT = Payment per period
r = Interest rate

In this case, the payment per period is Rs 18,000, and the interest rate is 8% p.a. compounded semi-annually.

First, we need to convert the interest rate to a semi-annual rate. Since the interest is compounded semi-annually, the interest rate per period would be half of the annual rate. So, the semi-annual interest rate would be 8% divided by 2, which is 4%.

Now, we can substitute the values into the formula:

PV = 18,000 / 0.04

PV = 450,000

Therefore, the present value of the perpetuity is Rs 450,000.