Q.1 If difference between C.I. & S.I. on a certain sum of money for 2yrs at 5% p.a. is Rs.122. Find the sum ? A) Rs. 14000 B) Rs. 15000 C) Rs. 16000 D) Rs. 17000 Ans. C Shortcut : Sum = Difference * (100)3 / r2 (300+r) Or 122 * (100)3 / 52 (300+5) …
Q.1 Difference between the simple interest received from two banks on Rs. 500 for two years is Rs. 2.50. What is the difference between their rates (in %) ? A) 0.25 B) 0.5 C) 1 D) 2.5 Ans. A Let x & y are the interest rate of two banksThus,According to question,500*x*2/100 – 500*y*2/100 = …
Q.1 Rs. 4800 becomes Rs. 6000 in 4 yrs at a certain rate of C.I. What will be the sum after 12 yrs ?A) Rs. 9375B) Rs. 9475C) Rs. 9575D) Rs. 9675 Ans. AShortcut:4800 [(6000)12/4 / (4800)12/4-1 ]Or 4800 * (6000)3 / (4800)2Rs. 9375 Q.2 A sum of money doubles itself at C.I. in 15 …
