1. If Rs. 10 be allowed as true discount on a bill of Rs. 110 due at the end of a certain time, then the discount allowed on the same sum due at the end of double the time is:
A) Rs. 20
B) Rs. 21.81
C) Rs. 22
D) Rs. 18.33
Answer:D) Rs. 18.33
S.I. on Rs. (110 - 10) for a certain time = Rs. 10.
S.I. on Rs. 100 for double the time = Rs. 20.
T.D. on Rs. 120 = Rs. (120 - 100) = Rs. 20.
2) The simple interest and the true discount on a certain sum for a given time and at a given rate are Rs. 85 and Rs. 80 respectively. The sum is: ?
A) Rs. 1800
B) Rs. 1450
C) Rs. 1360
D) Rs. 6800
Answer:C) Rs. 1360
3) If the true discount on s sum due 2 years hence at 14% per annum be Rs. 168, the sum due is:
4) Rahul purchased a cow for Rs. 3000 and sold it the same day for Rs. 3600, allowing the buyer a credit of 2 years. If the rate of interest be 10% per annum, then Rahul has a gain of:
5)The true-discount on Rs.2480 due after a certain period at 5% is Rs.80. Find the
P.W= Amount – (T.D)