CAT 2007 Quant Questions
Q1. The price of Darjeeling tea (in rupees per kilogram) is 100 + 0.10n, on the nth day of 2007 (n = 1, 2, …, 100), and then remains constant. On the other hand, the price of Ooty tea (in rupees per kilogram) is 89 + 0.15n, on the nth day of 2007 (n = 1, 2, …, 365). On which date in 2007 will the prices of these two varieties of tea be equal?
(A) May 21
(B) April 11
(C) May 20
(D) April 10
(E) June 30
Answer: C
Q2. A quadratic function f(x) attains a maximum of 3 at x = 1. The value of the function at x = 0 is 1. What is the value of f(x) at x = 10?
(A) –119
(B) –159
(C) –110
(D) –180
(E) –105
Answer: B
Q3. Two circles with centres P and Q cut each other at two distinct points A and B The circles have the same radii and neither P nor Q falls within the intersection of the circles. What is the smallest range that includes all possible values of the angle AQP in degrees?
(A) Between 0 and 90
(B) Between 0 and 30
(C) Between 0 and 60
(D) Between 0 and 75
(E) Between 0 and 45
Answer: C
Q4. The number of common terms in the two sequences 17, 21, 25, …, 417 and 16, 21, 26, …, 466 is
(A) 78
(B) 19
(C) 20
(D) 77
(E) 22
Answer: C
Directions for next 2 questions:
The figure below shows the plan of a town. The streets are at right angles to each other. A rectangular park (P) is situated inside the town with a diagonal road running through it. There is also a prohibited region (D) in the town.
Q5. Neelam rides her bicycle from her house at A to her office at B, taking the shortest path. Then the number of possible shortest paths that she can choose is
(A) 60
(B) 75
(C) 45
(D) 90
(E) 72
Answer: D
Q6. Neelam rides her bicycle from her house at A to her club at C, via B taking the shortest path. Then the number of possible shortest paths that she can choose is
(A) 1170
(B) 630
(C) 792
(D) 1200
(E) 936
Answer: A
Q7. Let f(x) be a function satisfying f(x) × f(y) = f(xy) for all real x, y. Let f(2) = 4, then what is the value of f(1/2)?
(A) 0
(B) 1/4
(C) 1/2
(D) 1
(E) Cannot be determined
Answer: B
Q8. The integers 1, 2, …, 40 are written on a blackboard. The following operation is then repeated 39 times: In each repetition, any two numbers, say a and b, currently on the blackboard are erased and a new number a + b – 1 is written. What will be the number left on the board at the end?
(A) 820
(B) 821
(C) 781
(D) 819
(E) 780
Answer: C
Q9. Suppose, the seed of any positive integer n is defined as follows:
seed(n) = n, if n < 10
= seed(s(n)), otherwise,
where s(n) indicates the sum of digits of n.
For example, seed(7) = 7, seed(248) = seed(2 + 4 + 8) = seed(14) = seed(1 + 4) = seed(5) = 5 et(C)
How many positive integers n, such that n < 500, will have seed(n) = 9?
(A) 39
(B) 72
(C) 81
(D) 108
(E) 55
Answer: E
Q10. n a triangle ABC, the lengths of the sides AB and AC equal 17.5 cm and 9 cm respectively. Let D be a point on the line segment BC such that AD is perpendicular to BC. If AD = 3 cm, then what is the radius (in cm) of the circle circumscribing the triangle ABC?
(A) 17.05
(B) 27.85
(C) 22.45
(D) 32.25
(E) 26.25
Answer: E
Q11. What are the last two digits of 72008?
(A) 21
(B) 61
(C) 01
(D) 41
(E) 81
Answer: C
Q12. If the roots of the equation x3− ax2 + bx – c = 0 are three consecutive integers, then what is the smallest possible value of b?
(A) -1/√3
(B) -1
(C) 0
(D) 1
(E) 1/√3
Answer: B
Q13. Consider obtuse-angled triangles with sides 8 cm, 15 cm and x cm. If x is an integer, then how many such triangles exist?
(A) 5
(B) 21
(C) 10
(D) 15
(E) 14
Answer: C
Q14. How many integers, greater than 999 but not greater than 4000, can be formed with the digits 0, 1, 2, 3 and 4, if repetition of digits is allowed?
(A) 499
(B) 500
(C) 375
(D) 376
(E) 501
Answer: D
Q15. What is the number of distinct terms in the expansion of (a + b + c)20?
(A) 231
(B) 253
(C) 242
(D) 210
(E) 228
Answer: A
Q16. Consider a square ABCD with midpoints E, F, G, H of AB, BC, CD and DA respectively. Let L denote the line passing through F and H. Consider points P and Q, on L and inside ABCD, such that the angles APD and BQC both equal 120°. What is the ratio of the area of ABQCDP to the remaining area inside ABCD?
Answer: E
Q17. Three consecutive positive integers are raised to the first, second and third powers respectively and then added. The sum so obtained is a perfect square whose square root equals the total of the three original integers. Which of the following best describes the minimum, say m, of these three integers?
(A) 1 ≤ m ≤ 3
(B) 4 ≤ m ≤ 6
(C) 7 ≤ m ≤ 9
(D) 10 ≤ m ≤ 12
(E) 13 ≤ m ≤ 15
Answer: A
Answer: E
Q19. Two circles, both of radii 1 cm, intersect such that the circumference of each one passes through the centre of the circle of the other. What is the area (in sq cm) of the intersecting region?
Answer: E
Q20. Rahim plans to drive from city A to station C, at the speed of 70 km per hour, to catch a train arriving there from B. He must reach C at least 15 minutes before the arrival of the train. The train leaves B, located 500 km south of A, at 8:00 am and travels at a speed of 50 km per hour. It is known that C is located between west and northwest of B, with BC at 60° to AB. Also, C is located between south and southwest of A with AC at 30° to AB. The latest time by which Rahim must leave A and still catch the train is closest to
(A) 6:15 am
(B) 6:30 am
(C) 6:45 am
(D) 7:00 am
(E) 7:15 am
Answer: B
Q21. Consider a right circular cone of base radius 4 cm and height 10 cm. A cylinder is to be placed inside the cone with one of the flat surface resting on the base of the cone. Find the largest possible total surface area (in sq. cm) of the cylinder.
(A) 100π/3
(B) 80π/3
(C) 120π/7
(D) 130π/9
(E) 110π/7
Answer: A
Answer the following question based on the information given below.
Five horses, Red, White, Grey, Black and Spotted participated in a race. As per the rules of the race, the persons betting on the winning horse get four times the bet amount and those betting on the horse that came in second get thrice the bet amount. Moreover, the bet amount is returned to those betting on the horse that came in third, and the rest lose the bet amount. Raju bets Rs. 3000, Rs. 2000 Rs. 1000 on Red, White and Black horses respectively and ends up with no profit and no loss.
Q22. Suppose, in addition, it is known that Grey came in fourth. Then which of the following cannot be true?
(A) Spotted came in first
(B) Red finished last
(C) White came in second
(D) Black came in second
(E) There was one horse between Black and White
Answer: C
Q23. Which of the following cannot be true?
(A) At least two horses finished before Spotted
(B) Red finished last
(C) There were three horses between Black and Spotted
(D) There were three horses between White and Red
(E) Grey came in second
Answer: D
Each question is followed by two statements, A and Answer each question using the following instructions:
Mark option (1) if the question can be answered by using statement A alone but not by using statement B alone.
Mark option (2) if the question can be answered by using statement B alone but not by using statement A alone.
Mark option (3) if the question can be answered by using either statement alone.
Mark option (4) if the question can be answered by using both the statements together but not by either of the statements alone.
Mark option (5) if the question cannot be answered on the basis of the two statements.
- In a single elimination tournament, any player is eliminated with a single loss. The tournament is played in multiple rounds subject to the following rules:
- If the number of players, say n, in any round is even, then the players are grouped in to n/2 pairs. The players in each pair play a match against each other and the winner moves on to the next round
- If the number of players, say n, in any round is odd, then one of them is given a bye, that is, he automatically moves on to the next round. The remaining (n − 1) players are grouped into (n − 1)/2 pairs. The players in each pair play a match against each other and the winner moves on to the next round. No player gets more than one bye in the entire tournament.
- Thus, if n is even, then n/2 players move on to the next round while if n is odd, then (n + 1)/2 players move on to the next round.
- The process is continued till the final round, which obviously is played between two players. The winner in the final round is the champion of the tournament.
Q24. What is the number of matches played by the champion?
A: The entry list for the tournament consists of 83 players.
B: The champion received one bye.
(A) 1
(B) 2
(C) 3
(D) 4
(E) 5
Answer: D
Q25. A function f(x) satisfies f(1) = 3600, and f(1) + f(2) + … + f(n) = n²f(n), for all positive integers n > 1. What is the value of f(9)?
(A) 80
(B) 240
(C) 200
(D) 100
(E) 120
Answer: A
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