question: What amount does Kiran get if he invests Rs. 18000 at 15% p.a. simple interest for four years?
Options:
(A) 228777
(B) 26788
(C) 26088
(D) 28800
(E) 67881
answer: Stream of consciousness: Simple interest = (18000 * 4 * 15)/100 = Rs. 10800
Amount = P + I = 18000 + 10800 = Rs. 28800 The answer is (D).

q: The price of a T.V. set worth Rs. 8000 is to be paid in 20 installments of Rs. 750 each. If the rate of interest be 6% per annum, and the first installment be paid at the time of purchase, then the value of the last installment covering the interest as well will be?
Options:
(A) 7250
(B) 7200
(C) 7820
(D) 6000
(E) 2799
a: Stream of consciousness: Money paid in cash = Rs. 750
Balance payment = (8000- 1000) = Rs. 7250 The answer is (A).

question: What will come in place of the x in the following Number series? 68, 36, 20, 12, 8, x
Options:
(A) 6
(B) 4
(C) 2
(D) 1
(E) 0
answer: Stream of consciousness: 68
68 / 2 + 2 = 36
36 / 2 + 2 = 20
20 / 2 + 2 = 12
12 / 2 + 2 = 8
8 / 2 + 2 = 6 The answer is (A).

q: How much is 60% of 40 is greater than 4/5 of 25?
Options:
(A) 4
(B) 6
(C) 10
(D) 8
(E) 13
a: Stream of consciousness: 60/100) * 40 (4/5) * 25
24 - 20 = 4 The answer is (A).

question: At 15:00 there were 21 students in the computer lab. At 15:03 and every three minutes after that, 3 students entered the lab. If at 15:10 and every ten minutes after that 8 students left the lab, how many students were in the computer lab at 15:44 ?
Options:
(A) 7
(B) 14
(C) 25
(D) 27
(E) 30
answer: Stream of consciousness: Initial no of students + 3 * (1 + No of possible 3 minute intervals between 15:03 and 15:44) -
8 *(1 + No of possible 10 minute intervals between 15:10 and 15:44)
20 + 3*14 -8 * 4 = 27 The answer is (D).

question: Henry earns $120 a week from his job. His income increased and now makes $180 a week. What is the percent increase?
Options:
(A) 70%
(B) 60%
(C) 50%
(D) 40%
(E) 30%
answer:
Stream of consciousness: Increase = (60/120)*100 = (1/2)*100 = 50%. The answer is (C).