Q1:

Inequalities

Hard

Any non-zero real numbers x,yx, y such that y≠3y \neq 3 and xy<x+3y−3\frac{x}{y}<\frac{x+3}{y-3}, Will satisfy the condition.

Answer options
Option 3
Correct Answer
Explanation for CAT QA question 1

Q2:

HCF/LCM

Medium

For any natural numbers m,nm, n, and kk, such that kk divides both m+2nm+2 n and 3m3 m +4n,k+4 n, k must be a common divisor of

Answer options
Option 4
Correct Answer
Explanation for CAT QA question 2

Q3:

Indices

Hard

The sum of all possible values of xx satisfying the equations 24x2−22x2+x+16+22x+30=02^{4 x^{2}}-2^{2 x^{2}+x+16}+2^{2 x+30}=0, is

Answer options
Option 3
Correct Answer
Explanation for CAT QA question 3

Q4:

Indices

Medium

Let aa, bb, mm and nn be natural numbers such that a>1a > 1 and b>1b > 1. If ambn=144145a^m b^n = 144^{145}, then the largest possible value of n−mn - m is

Answer options
Option 3
Correct Answer
Explanation for CAT QA question 4

Q5:

Minima & Maxima

Medium

Let k be the largest integer such that the equation (x−1)2+2kx+11=0(x - 1)^2 + 2kx + 11 = 0 has no real roots. If y is a positive real number, then the least possible value of k/4y+9yk/4y + 9y is

6
Correct Answer
Explanation for CAT QA question 5

Q6:

Factorisation

Medium

The number of positive integers less than 5050, having exactly two distinct factors other than 11 and itself, is

15
Correct Answer
Explanation for CAT QA question 6

Q7:

Logarithms

Medium

For some positive real number xx, if log⁡3(x)+log⁡x(25)log⁡x(0.008)=163\log_{\sqrt{3}}(x) + \frac{\log_x (25)}{\log_x (0.008)} = \frac{16}{3}, then the value of log⁡3(3x2)\log_3(3x^2) is

7
Correct Answer
Explanation for CAT QA question 7

Q8:

Time & Work

Hard

Pipes AA and CC are fill pipes while Pipe BB is a drain pipe of a tank. Pipe BB empties the full tank in one hour less than the time taken by Pipe AA to fill the empty tank. When pipes AA, BB and CC are turned on together, the empty tank is filled in two hours. If pipes BB and CC are turned on together when the tank is empty and Pipe BB is turned off after one hour, then Pipe CC takes another one hour and 1515 minutes to fill the remaining tank. If Pipe AA can fill the empty tank in less than five hours, then the time taken, in minutes, by Pipe CC to fill the empty tank is

Answer options
Option 4
Correct Answer
Explanation for CAT QA question 8

Q9:

Profit & Loss

Medium

Minu purchases a pair of sunglasses at Rs. 10001000 and sells to Kanu at 20%20 \% profit. Then, Kanu sells it back to Minu at 20%20 \% loss. Finally, Minu sells the same pair of sunglasses to Tanu. If the total profit made by Minu from all her transactions is Rs. 500500, then the percentage of profit made by Minu when she sold the pair of sunglasses to Tanu is

Answer options
Option 1
Correct Answer
Explanation for CAT QA question 9

Q10:

Ratio, Proportion & Variation

Easy

In a company, 20%20\% of the employees work in the manufacturing department. If the total salary obtained by all the manufacturing employees is one-sixth of the total salary obtained by all the employees in the company, then the ratio of the average salary obtained by the manufacturing employees to the average salary obtained by the non-manufacturing employees is

Answer options
Option 2
Correct Answer
Explanation for CAT QA question 10

Q11:

Time, Speed & Distance

Medium

Ravi is driving at a speed of 4040 km/h on a road. Vijay is 5454 meters behind Ravi and driving in the same direction as Ravi. Ashok is driving along the same road from the opposite direction at a speed of 5050 km/h and is 225225 meters away from Ravi. The speed, in km/h, at which Vijay should drive so that all the three cross each other at the same time, is

Answer options
Option 1
Correct Answer
Explanation for CAT QA question 11

Q12:

Ratio, Proportion & Variation

Hard

The price of a precious stone is directly proportional to the square of its weight. Sita has a precious stone weighing 1818 units. If she breaks it into four pieces with each piece having distinct integer weight, then the difference between the highest and lowest possible values of the total price of the four pieces will be 288000288000. Then, the price of the original precious stone is

Answer options
Option 2
Correct Answer
Explanation for CAT QA question 12

Q13:

Simple & Compound Interest

Anil borrows Rs 2 lakhs at an interest rate of 8% per annum, compounded half-yearly. He repays Rs 10320 at the end of the first year and closes the loan by paying the outstanding amount at the end of the third year. Then, the total interest, in rupees, paid over the three years is nearest to

Answer options
Option 3
Correct Answer
Explanation for CAT QA question 13

Q14:

Profit & Loss

Hard

Jayant bought a certain number of white shirts at the rate of Rs 10001000 per piece and a certain number of blue shirts at the rate of Rs 11251125 per piece. For each shirt, he then set a fixed market price which was 25%25 \% higher than the average cost of all the shirts. He sold all the shirts at a discount of 10%10 \% and made a total profit of Rs 5100051000. If he bought both colors of shirts, then the maximum possible total number of shirts that he could have bought is

407
Correct Answer
Explanation for CAT QA question 14

Q15:

Linear Equation

Medium

If certain amount of money is divided equally among n person, each one receives Rs 352352. However, if two persons receive Rs 506506 each and the remaining amount is divided equally among the other persons, each of them received less than or equal to Rs 330330. Then, the maximum possible value of nn is

Answer options
Option 2
Correct Answer
Explanation for CAT QA question 15

Q16:

Mixture & Alligation

Easy

A container has 4040 liters of milk. Then, 44 liters are removed from the container and replaced with 44 liters of water. This process of replacing 44 liters of the liquid in the container with an equal volume of water is continued repeatedly. The smallest number of times of doing this process, after which the volume of milk in the container becomes less than that of water, is

7
Correct Answer
Explanation for CAT QA question 16

Q17:

Triangles

Medium

A triangle is drawn with its vertices on the circle C such that one of its sides is a diameter of C and the other two sides have their lengths in the ratio a:ba: b. If the radius of the circle is rr, then the area of the triangle is

Answer options
Option 3
Correct Answer
Explanation for CAT QA question 17

Q18:

Quadrilaterals

Hard

In a rectangle ABCD, AB = 9 cm and BC = 6 cm. P and Q are two points on BC such that the areas of the figures ABP, APQ, and AQCD are in geometric progression. If the area of the figure AQCD is four times the area of triangle ABP, then BP : PQ : QC is

Answer options
Option 2
Correct Answer
Explanation for CAT QA question 18

Q19:

Modulus

Hard

The area of the quadrilateral bounded by the YY-axis, the line x=5x=5, and the lines ∣x−y∣−∣x−5∣=2|x-y|-|x-5|=2, is

45
Correct Answer
Explanation for CAT QA question 19

Q20:

Progression & Series

Medium

Let both the series a1,a2,a3,…a_1, a_2, a_3, \dots and b1,b2,b3…b_1, b_2, b_3 \dots be in arithmetic progression such that the common differences of both the series are prime numbers. If a5=b9a_5 = b_9, a19=b19a_{19} = b_{19} and b2=0b_2 = 0, then a11a_{11} equals

Answer options
Option 1
Correct Answer
Explanation for CAT QA question 20

Q21:

Identities

Medium

If p2+q2−29=2pq−20=52−2pqp^{2}+q^{2}-29=2 p q-20=52-2 p q, then the difference between the maximum and minimum possible value of (p3−q3)\left(p^{3}-q^{3}\right) is

Answer options
Option 2
Correct Answer
Explanation for CAT QA question 21

Q22:

Progression & Series

Medium

Let ana_n and bnb_n be two sequences such that an=13+6(n−1)a_n = 13 + 6 (n - 1) and bn=15+7(n−1)b_n = 15 + 7 (n - 1) for all natural numbers nn. Then, the largest three digit integer that is common to both these sequences, is

967
Correct Answer
Explanation for CAT QA question 22

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