q: he population of a city is 160,000. If it increases at the rate of 6% per annum, then what will be its population 2 years hence?
Options:
(A) 1797787
(B) 1797723
(C) 179776
(D) 179728
(E) 179718
a: Stream of consciousness: Population after n years = P [1 + (R/100)]2
Population after 2 years = 160000 * [1 + 6/100]2 = (160000 x 53/50 x 53/50) = 179776 The answer is (C).

question: What approximate value should come in place of question mark (?) in the following equation
287.532 + 1894.029 657.48 = 743.095 + ?
Options:
(A) 870
(B) 790
(C) 780
(D) 770
(E) 890
answer: Stream of consciousness: ? = 285 + 1895 655 745 or, ? = 780 The answer is (C).

q: Find the value of y from (12)^3 x 6^4 432 = y?
Options:
(A) 2356
(B) 3454
(C) 4656
(D) 3456
(E) 5184
a: Stream of consciousness: Given Exp. = (12)3 x 64 = (12)3 x 64 = (12)2 x 62 = (72)2 = 5184
432 12 x 62 The answer is (E).

question: The length of each side of an equilateral triangle having an area of 43 cm2 is?
Options:
(A) 1/8
(B) 1/9
(C) 1/5
(D) 1/23
(E) 1/2
answer: Stream of consciousness: Six persons can be arranged in a row in 6! ways. Treat the three persons to sit together as one unit then there four persons and they can be arranged in 4! ways. Again three persons can be arranged among them selves in 3! ways. Favourable outcomes = 3!4! Required probability = 3!4!/6! = 1/5 The answer is (C).

q: Find the simple interest on Rs.580 for 11 months at 9 paisa per month?
Options:
(A) 574
(B) 270
(C) 566
(D) 266
(E) 121
a: Stream of consciousness: I = (580*11*9)/100 = 574 The answer is (A).

q: Interest Rate: 4% monthly Starting Balance: 124 Time Passed: 4 months How much interest has accrued if calculated as compound interest? What is the new total balance?
Options:
(A) 21 & 145
(B) 22 & 146
(C) 23 & 145
(D) 20 & 140
(E) None
a:
Stream of consciousness: Compound Interest: Total Balance = P(1 + R)T P = principle = starting balance = $124 R = interest rate = 4% T = time = 4 years Total balance = principle (1 + interest rate)time = 124 (1 + (4 / 100))4 = 145 Interest accrued = total balance - starting balance = 145 - 124 = 21 The answer is (A).