is answer (a), wednesday ?

I got it by the following method:

monday morning price of bond = p

for the next n days, the price increased by r% each day. So basically the price got compounded (compound interest) on a daily basis.

Hence, at the end of n days, price of bond = p(1 + r/100)^n

on the n+1th day, price = [p(1 + r/100)^n] - q = v ( as given in the q)

also r = 100 [sqrt{(v+q)/p} - 1]

Substituting this in the above eqn and solving, we get,

v = {(v+q)^n/2}/{p^(n/2-1)} - q --- (i)

also the choices given result in n having the value as 2,3,4,7 and 8 resp.

I chose the first answer and substituted 2 in eqn (i) and ... got the answ.

..

Alternate method:
for eqn (i) to hold true,

n/2 = 1 (so that q and q can cancel out); and

n/2 -1 = 0 so that the denominator in the first term reduces to 1.

from either of these eqns, you get n = 2. Hence answer is (A).

any OE ? what is the OA pls ?

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Cheers!

Prashrash.