q: What amount does Kiran get if he invests Rs. 18000 at 15% p.a. simple interest for two years?
Options:
(A) 29893
(B) 27773
(C) 29989
(D) 28800
(E) 23400
a: OK... Simple interest = (18000 * 2 * 15)/100 = Rs. 5400
Amount = P + I = 18000 + 5400 = Rs. 23400
The answer is (E).

q: The compound ratio of 2/3, 6/7, 1/3 and 1/8 is given by?
Options:
(A) 1/56
(B) 1/42
(C) 1/40
(D) 1/41
(E) 1/47
a: OK... 2/3 * 6/7 * 1/3 * 1/8 = 1/42
The answer is (B).

q: How much is 80% of 40 is greater than 4/5 of 20?
Options:
(A) 12
(B) 27
(C) 18
(D) 16
(E) 81
a:
OK... (80/100) * 40 (4/5) * 20
32 - 16 = 16
The answer is (D).