q: Find the simple interest on Rs.450 for 8 months at 5 paisa per month?
Options:
(A) 277
(B) 270
(C) 180
(D) 266
(E) 121
a: Stream of consciousness: I = (450*8*5)/100 = 180 The answer is (C).

question: If we need to change the average age of a group containing 4 persons from 40 to 38 by adding a person. What should be the age of the person newly added to the group?
Options:
(A) 20
(B) 25
(C) 30
(D) 38
(E) 40
answer: Stream of consciousness: Sum of the ages of the group having 4 persons and average 40 = 4x40 = 160
Sum of the ages of the group having 5 persons and average 38 = 5x38 = 190
Age of the new person added to the group = 190-160 = 30 The answer is (C).

q: The average of first 14 even numbers is?
Options:
(A) 19
(B) 18
(C) 16
(D) 11
(E) 15
a: Stream of consciousness: Sum of 14 even numbers = 14 * 15 = 210
Average = 210/14 = 15 The answer is (E).

question: Find the odd man out? 3, 7, 15, 17, 22, 27, 29
Options:
(A) 15
(B) 17
(C) 22
(D) 27
(E) 0
answer: Stream of consciousness: Each of the numbers is odd number except 22. The number 22 is the only even number. The answer is (C).

q: Find the C.I. on a sum of Rs.1600 for 9 months at 20% per annum, interest being compounded quarterly?
Options:
(A) 3388
(B) 2778
(C) 2522
(D) 2988
(E) 2771
a: Stream of consciousness: A = 1600(21/20)3 = 2522 The answer is (C).

q: The price of a T.V. set worth Rs. 10000 is to be paid in 20 installments of Rs. 1000 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) 9000
(B) 26699
(C) 96000
(D) 19000
(E) 26711
a:
Stream of consciousness: Money paid in cash = Rs. 1000
Balance payment = (10000 - 1000) = Rs. 9000 The answer is (A).