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31st July 2014, 12:22 PM
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Re: ISI Entrance Exam Question Paper

Here I am providing the list of few questions of the Question Paper of ISI Entrance Exam which you are looking for .

ISI Entrance Exam Question Paper

1. Kupamonduk, the frog, lives in a well 14 feet deep. One fine morning
she has an urge to see the world, and starts to climb out of her well.
Every day she climbs up by 5 feet when there is light, but slides back
by 3 feet in the dark. How many days will she take to climb out of the
well?
(A) 3,
(B) 8,
(C) 6,
(D) None of the above.
2. The derivative of f(x) = jxj2 at x = 0 is,
(A) -1,
(B) Non-existent,
(C) 0,
(D) 1/2.
3. Let N = f1; 2; 3; : : :g be the set of natural numbers. For each n 2 N;
define An = f(n + 1)k : k 2 Ng. Then A1 \ A2 equals
(A) A3,
(B) A4,
(C) A5,
(D) A6.
4. Let S = fa; b; cg be a set such that a, b and c are distinct real numbers.
Then minfmaxfa; bg; maxfb; cg; maxfc; agg is always
(A) the highest number in S,
(B) the second highest number in S,
(C) the lowest number in S,
(D) the arithmetic mean of the three numbers in S.
5. The sequence < _4_n >, n = 1; 2; _ _ _ , is
(A) Unbounded and monotone increasing,
(B) Unbounded and monotone decreasing,
(C) Bounded and convergent,
(D) Bounded but not convergent.
6. ∫ x
7x2+2dx equals
(A) 1
14 ln(7x2 + 2)+ constant,
(B) 7x2 + 2,
(C) ln x+ constant,
(D) None of the above.
7. The number of real roots of the equation
2(x _ 1)2 = (x _ 3)2 + (x + 1)2 _ 8
is
(A) Zero,
(B) One,
(C) Two,
(D) None of the above.
2
8. The three vectors [0; 1], [1; 0] and [1000; 1000] are
(A) Dependent,
(B) Independent,
(C) Pairwise orthogonal,
(D) None of the above.
9. The function f( is increasing over [a; b]. Then [f(]n, where n is an
odd integer greater than 1, is necessarily
(A) Increasing over [a; b],
(B) Decreasing over [a; b],
(C) Increasing over [a; b] if and only if f( is positive over [a; b],
(D) None of the above.
10. The determinant of the matrix ______
1 2 3
4 5 6
7 8 9
______
is
(A) 21,
(B) -16,
(C) 0,
(D) 14.
11. In what ratio should a given line be divided into two parts, so that
the area of the rectangle formed by the two parts as the sides is the
maximum possible?
(A) 1 is to 1,
(B) 1 is to 4,
(C) 3 is to 2,
(D) None of the above.
12. Suppose (x_; y_) solves:
Minimize ax + by;
subject to
x_ + y_ = M;
and x; y _ 0, where a > b > 0, M > 0 and _ > 1. Then, the solution
is,
3
(A) x___1
y___1 = a
b ,
(B) x_ = 0; y_ = M
1
_ ,
(C) y_ = 0; x_ = M
1
_ ,
(D) None of the above.
13. Three boys and two girls are to be seated in a row for a photograph. It
is desired that no two girls sit together. The number of ways in which
they can be so arranged is
(A) 4P2 _ 3!,
(B) 3P2 _ 2!
(C) 2! _ 3!
(D) None of the above.
14. The domain of x for which px + p3 _ x + px2 _ 4x is real is,
(A) [0,3],
(B) (0,3),
(C) f0g,
(D) None of the above.
15. P (x) is a quadratic polynomial such that P (1) = P (-1). Then
(A) The two roots sum to zero,
(B) The two roots sum to 1,
(C) One root is twice the other,
(D) None of the above.
16. The expression √11 + 6p2 +√11 _ 6p2 is
(A) Positive and an even integer,
(B) Positive and an odd integer,
(C) Positive and irrational,
(D) None of the above.
17. What is the maximum value of a(1 _ a)b(1 _ b)c(1 _ c), where a, b, c
vary over all positive fractional values?
A 1,
B 1
8 ,
4
C 1
27 ,
D 1
64 .
18. There are four modes of transportation in Delhi: (A) Auto-rickshaw,
(B) Bus, (C) Car, and (D) Delhi-Metro. The probability of using
transports A, B, C, D by an individual is 1
9 , 2
9 , 4
9 , 2
9 respectively. The
probability that he arrives late at work if he uses transportation A, B,
C, D is 5
7 , 4
7 , 6
7 , and 6
7 respectively. What is the probability that he
used transport A if he reached office on time?
A 1
9 ,
B 1
7 ,
C 3
7 ,
D 2
9 .
19. What is the least (strictly) positive value of the expression a3+b3+c3_
3abc, where a, b, c vary over all strictly positive integers? (You may use
the identity a3+b3+c3_3abc = 1
2 (a+b+c)((a_b)2+(b_c)2+(c_a)2).)
A 2,
B 3,
C 4,
D 8.
20. If a2 + b2 + c2 = 1, then ab + bc + ca is,
(A) _0:75,
(B) Belongs to the interval [_1; _0:5],
(C) Belongs to the interval [0:5; 1],
(D) None of the above.
21. Consider the following linear programming problem:
Maximize a + b subject to
a + 2b _ 4,
a + 6b _ 6,
5
a _ 2b _ 2,
a; b _ 0.
An optimal solution is:
(A) a=4, b=0,
(B) a=0, b=1,
(C) a=3,b=1/2,
(D) None of the above.
22. The value of ∫_1
_4
1
xdx equals,
(A) ln 4,
(B) Undefined,
(C) ln(_4) _ ln(_1),
(D) None of the above.
23. Given x _ y _ z, and x + y + z = 9, the maximum value of x + 3y +
5z is
(A) 27,
(B) 42,
(C) 21,
(D) 18.
24. A car with six sparkplugs is known to have two malfunctioning ones. If
two plugs are pulled out at random, what is the probability of getting
at least one malfunctioning plug.
(A) 1/15,
(B) 7/15,
(C) 8/15,
(D) 9/15.
25. Suppose there is a multiple choice test which has 20 questions. Each
question has two possible responses - true or false. Moreover, only
one of them is correct. Suppose a student answers each of them randomly.
Which one of the following statements is correct?
(A) The probability of getting 15 correct answers is less than the probability
of getting 5 correct answers,
(B) The probability of getting 15 correct answers is more than the
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probability of getting 5 correct answers,
(C) The probability of getting 15 correct answers is equal to the probability
of getting 5 correct answers,
(D) The answer depends on such things as the order of the questions.
26. From a group of 6 men and 5 women, how many different committees
consisting of three men and two women can be formed when it is known
that 2 of the men do not want to be on the committee together?
(A) 160,
(B) 80,
(C) 120,
(D) 200.
27. Consider any two consecutive integers a and b that are both greater
than 1. The sum (a2 + b2) is
(A) Always even,
(B) Always a prime number,
(C) Never a prime number,
(D) None of the above statements is correct.
28. The number of real non-negative roots of the equation
x2 _ 3jxj _ 10 = 0
is,
(A) 2,
(B) 1,
(C) 0,
(D) 3.
29. Let < an > and < bn >, n = 1; 2; _ _ _ , be two different sequences, where
< an > is convergent and < bn > is divergent. Then the sequence
< an + bn > is,
(A) Convergent,
(B) Divergent,
(C) Undefined,
(D) None of the above.
7
30. Consider the function
f(x) = jxj
1 + jxj
:
This function is,
(A) Increasing in x when x _ 0,
(B) Decreasing in x,
(C) Increasing in x for all real x,
(D) None of the above.
Syllabus for ME II (Economics), 2012
Microeconomics: Theory of consumer behaviour, theory of production,
market structure under perfect competition, monopoly, price discrimination,
duopoly with Cournot and Bertrand competition (elementary problems) and
welfare economics.
Macroeconomics: National income accounting, simple Keynesian Model
of income determination and the multiplier, IS-LM Model, models of aggregate
demand and aggregate supply, Harrod-Domar and Solow models of
growth, money, banking and inflation.
Sample Questions for ME II (Economics), 2012
1. A price taking firm makes machine tools Y using labour and capital
according to the following production function
Y = L0:25K0:25:
Labour can be hired at the beginning of every week, while capital can
be hired only at the beginning of every month. It is given that the wage
rate = rental rate of capital = 10. Show that the short run (week) cost
function is 10Y 4=K_ where the amount of capital is fixed at K_ and
the long run (month) cost function is 20Y 2.
2. Consider the following IS-LM model
C = 200 + 0:25YD,
I = 150 + 0:25Y _ 1000i,
8
G = 250,
T = 200,
(m=p)d = 2Y _ 8000i,
(m=p) = 1600,
where C = aggregate consumption, I = investment, G = government
expenditures, T = taxes, (m=p)d = money demand, (m=p) = money
supply, YD = disposable income (Y _ T). Solve for the equilibrium
values of all variables. How is the solution altered when money supply
is increased to (m=p) = 1840? Explain intuitively the effect of
expansionary monetary policy on investment in the short run.
3. Suppose that a price-taking consumer A maximizes the utility function
U(x; y) = x_ + y_ with _ > 0 subject to a budget constraint. Assume
prices of both goods, x and y, are equal. Derive the demand function
for both goods. What would your answer be if the price of x is twice
that of the price of y?
4. Assume the production function for the economy is given by
Y = L0:5K0:5
where Y denotes output, K denotes the capital stock and L denotes
labour. The evolution of the capital stock is given by
Kt+1 = (1 _ _)Kt + It
where _ lies between 0 and 1 and is the rate of depreciation of capital.
I represents investment, given by It = sYt, where s is the savings rate.
Derive the expression of steady state consumption and find out the
savings rate that maximizes steady state consumption.
5. There are two goods x and y. Individual A has endowments of 25 units
of good x and 15 units of good y. Individual B has endowments of 15
units of good x and 30 units of good y. The price of good y is Re. 1,
no matter whether the individual buys or sells the good. The price of
good x is Re. 1 if the individual wishes to sell it. It is, however, Rs. 3 if
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the individual wishes to buy it. Let Cx and Cy denote the consumption
of these goods. Suppose that individual B chooses to consume 20 units
of good x and individual A does not buy or sell any of the goods and
chooses to consume her endowment. Could A and B have the same
preferences?
6. A monopolist has cost function c(y) = y so that its marginal cost is
constant at Re. 1 per unit. It faces the following demand curve
D(p) = 


0; if p > 20
100
p
; if p _ 20.
Find the profit maximizing level of output if the government imposes a
per unit tax of Re. 1 per unit, and also the dead-weight loss from the
tax.
7. A library has to be located on the interval [0; 1]. There are three
consumers A, B and C located on the interval at locations 0.3, 0.4
and 0.6, respectively. If the library is located at x, then A, B and C’s
utilities are given by _jx_0:3j , _jx_0:4j and _jx_0:6j, respectively.
Define a Pareto-optimal location and examine whether the locations
x = 0:1; x = 0:3 and x = 0:6 are Pareto-optimal or not.
8. Consider an economy where the agents live for only two periods and
where there is only one good. The life-time utility of an agent is given
by U = u(c) + _v(d), where u and v are the first and second period
utilities, c and d are the first and second period consumptions and _
is the discount factor. _ lies between 0 and 1. Assume that both u
and v are strictly increasing and concave functions. In the first period,
income is w and in the second period, income is zero. The interest rate
on savings carried from period 1 to period 2 is r. There is a government
that taxes first period income. A proportion _ of income is taken away
by the government as taxes. This is then returned in the second period
to the agent as a lump sum transfer T. The government’s budget is
balanced i.e., T = _w. Set up the agent’s optimization problem and
write the first order condition assuming an interior solution. For given
10
values of r, _, w, show that increasing T will reduce consumer utility
if the interest rate is strictly positive.
9. A monopolist sells two products, X and Y . There are three consumers
with asymmetric preferences. Each consumer buys either one unit of
a product or does not buy the product at all. The per-unit maximum
willingness to pay of the consumers is given in the table below.
Consumer No. X Y
1 4 0
2 3 3
3 0 4.
The monopolist who wants to maximize total payoffs has three alternative
marketing strategies: (i) sell each commodity separately and
so charge a uniform unit price for each commodity separately (simple
monopoly pricing);(ii) offer the two commodities for sale only in a package
comprising of one unit of each, and hence charge a price for the
whole bundle (pure bundling strategy), and (iii) offer each commodity
separately as well as a package of both, that is, offer unit price for
each commodity as well as charge a bundle price (mixed bundling strategy).
However, the monopolist cannot price discriminate between the
consumers. Given the above data, find out the monopolist’s optimal
strategy and the corresponding prices of the products.
10. Consider two consumers with identical income M and utility function
U = xy where x is the amount of restaurant good consumed and y
is the amount of any other good consumed. The unit prices of the
goods are given. The consumers have two alternative plans to meet
the restaurant bill. Plan A: they eat together at the restaurant and
each pays his own bill. Plan B: they eat together at the restaurant
but each pays one-half of the total restaurant bill. Find equilibrium
consumption under plan B.
11. Consider a community having a fixed stock X of an exhaustible resource
(like oil) and choosing, over an infinite horizon, how much of
this resource is to be used up each period. While doing so, the com-
11
munity maximizes an intertemporal utility function U = ∑_tln(Ct)
where Ct represents consumption or use of the resource at period t and
_(0 < _ < 1) is the discount factor. Express the optimal consumption
Ct for any period t in terms of the parameter _ and X.
12. A consumer, with a given money income M, consumes 2 goods x1 and
x2 with given prices p1 and p2. Suppose that his utility function is
U(x1; x2) = Max(x1; x2). Find the Marshallian demand function for
goods x1, x2 and draw it in a graph. Further, suppose that his utility
function is U(x1; x2) = Min(x1; x2). Find the income and the own
price elasticities of demand for goods x1 and x2.
13. An economy, consisting of m individuals, is endowed with quantities
!1; !2; ::::; !n of n goods. The ith individual has a utility function
U(Ci
1 ;Ci
2 ; :::Ci
n ) = Ci
1 Ci
2 :::Ci
n , where Ci
j is consumption of good j of
individual i.
(a) Define an allocation,a Pareto inferior allocation and a Pareto optimal
allocation for this economy.
(b) Consider an allocation where Ci
j = _i!j for all j ,∑i _i = 1. Is this
allocation Pareto optimal?

14. Suppose that a monopolist operates in a domestic market facing a
demand curve p = 5 _ ( 3
2 )qh , where p is the domestic price and qh
is the quantity sold in the domestic market. This monopolist also has
the option of selling the product in the foreign market at a constant
price of 3. The monopolist has a cost function given by C(q) = q2 ,
where q is the total quantity that the monopolist produces. Suppose,
that the monopolist is not allowed to sell more than 1/6 units of the
good in the foreign market. Now find out the amount the monopolist
sells in the domestic market and in the foreign market.

15. An economy produces two goods, food (F) and manufacturing (M).
Food is produced by the production function F = (LF )1=2(T)1=2, where
LF is the labour employed, T is the amount of land used and F is the
amount of food produced. Manufacturing is produced by the production
function M = (LM)1=2(K)1=2, where LM is the labour employed,
12
K is the amount of capital used and M is the amount of manufacturing
production. Labour is perfectly mobile between the sectors (i.e. food
and manufacturing production) and the total amount of labour in this
economy is denoted by L. All the factors of production are fully employed.
Land is owned by the landlords and capital is owned by the capitalists.
You are also provided with the following data: K = 36; T = 49
, and L = 100. Also assume that the price of food and that of manufacturing
are the same and is equal to unity.

(a) Find the equilibrium levels of labour employment in the food sector
and the manufacturing sector (i.e. LF and LM respectively)
(b)Next, we introduce a small change in the description of the economy
given above. Assume that everything remains the same except for the
fact that land is owned by none; land comes for free! How much labour
would now be employed in the food and the manufacturing sectors?
16. Consider two countries - a domestic country (with excess capacity and
unlimited supply of labour) and a benevolent foreign country. The
domestic country produces a single good at a fixed price of Re.1 per unit
and is in equilibrium initially (i.e., in year 0) with income at Rs. 100
and consumption, investment and savings at Rs. 50 each. Investment
expenditure is autonomous. Final expenditure in any year t shows up
as income in year t (say, Yt) , but consumption expenditure in year t
(say, Ct) is given by: Ct = 0:5Yt_1.

The foreign country agrees to give a loan of Rs.100 to the domestic
country in year 1 at zero interest rate, but on conditions that it be
(i) used for investment only and (ii) repaid in full at the beginning of
the next year. The loan may be renewed every year, but on the same
conditions as above. Find the income, consumption, investment and
savings of the domestic country in year 1, year 2 and in final equilibrium
when the country takes the loan in year 1 only.


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