Q1:

2025 Slot 3

Indices

Medium

If 1212x×424x+12×52y=84z×2012x×2433x−612^{12x}\times4^{24x+12}\times5^{2y}=8^{4z}\times20^{12x}\times243^{3x-6}, where xx, yy and zz are natural numbers, then x+y+zx+y+z equals

112
Correct Answer
Explanation for 2025 Slot 3 QA question 1

Q2:

2025 Slot 2

Indices

Medium

If 9x2+2x−3−4(3x2+2x−2)+27=09^{x^2+2x-3} - 4\left(3^{x^2+2x-2}\right) + 27 = 0, then the product of all possible values of xx is

Answer options
Option 4
Correct Answer
Explanation for 2025 Slot 2 QA question 2

Q3:

CAT 2024 Slot 3

Indices

Easy

If 3a=4,4b=5,5c=6,6d=7,7e=83^{a}=4,4^{b}=5,5^{c}=6,6^{d}=7,7^{e}=8 and 8f=98^{f}=9, then the value of the product abcdef \textit{abcdef } is

Q4:

CAT 2024 Slot 2

Indices

Medium

If (x+62)12−(x−62)12=22(x+6\sqrt{2})^{\frac{1}{2}} - (x-6\sqrt{2})^{\frac{1}{2}} = 2\sqrt{2}, then x equals

Q5:

CAT 2024 Slot 1

Indices

Medium

The sum of all real values of kk for which (18)k×(132768)13=(18)×(132768)1k\small \left( \dfrac{1}{8} \right)^k \times \left( \dfrac{1}{32768} \right)^{\frac{1}{3}} = \left( \dfrac{1}{8} \right) \times \left( \dfrac{1}{32768} \right)^{\frac{1}{k}} is

Answer options
Option 2
Correct Answer
Explanation for CAT 2024 Slot 1 QA question 5

Q6:

CAT 2023 Slot 3

Indices

Medium

Let nn and mm be two positive integers such that there are exactly 4141 integers greater than 8m8^m and less than 8n8^n, which can be expressed as powers of 22. Then, the smallest possible value of n+mn + m is

Answer options
Option 1
Correct Answer
Explanation for CAT 2023 Slot 3 QA question 6

Q7:

CAT 2023 Slot 2

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 2023 Slot 2 QA question 7

Q8:

CAT 2023 Slot 2

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 2023 Slot 2 QA question 8

Q9:

CAT 2023 Slot 1

Indices

Medium

If5x+9+5x−9=3(2+2)\sqrt{5x+9}+\sqrt{5x-9} = 3(2+\sqrt{2}), then 10x+9\sqrt{10x + 9} is equal to

Answer options
Option 2
Correct Answer
Explanation for CAT 2023 Slot 1 QA question 9

Q10:

CAT 2022 Slot 3

Indices

Hard

If (75)3x−y=8752401\left(\sqrt{\frac{7}{5}}\right)^{3 x-y}=\frac{875}{2401} and (4ab)6x−y=(2ab)y−6x\left(\frac{4 a}{b}\right)^{6 x-y}=\left(\frac{2 a}{b}\right)^{y-6 x}

for all non-zero real values of aa and bb, then the value of x+yx + y is

Q11:

CAT 2022 Slot 2

Indices

Hard

The number of integer solutions of the equation (x2−10)(x2−3x−10)=1\left(x^{2}-10\right)^{\left(x^{2}-3 x-10\right)}=1 is

Q12:

CAT 2020 Slot 3

Indices

Medium

If a,b,ca, b, c are non-zero and 14a=36b=84c14^a = 36^b = 84^c, then 6b(1c−1a)6b \left( \frac{1}{c} - \frac{1}{a} \right) is equal to

Q13:

CAT 2020 Slot 2

Indices

Medium

The number of integers that satisfy the equality (x2−5x+7)x+1=1(x^2 - 5x + 7)^{x + 1} = 1 is

Answer options
Option 3
Correct Answer
Explanation for CAT 2020 Slot 2 QA question 13

Q14:

CAT 2020 Slot 1

Indices

Hard

If x=(4096)7+43x=(4096)^{7+4 \sqrt{3}}, then which of the following equals 6464 ?

Answer options
Option 3
Correct Answer
Explanation for CAT 2020 Slot 1 QA question 14

Q15:

CAT 2020 Slot 1

Indices

Medium

How many distinct positive integer-valued solutions exist to the equation (x2−7x+11)(x2−13x+42)=1?\left(x^{2}-7 x+11\right)^{\left(x^{2}-13 x+42\right)}=1 ?

Answer options
Option 2
Correct Answer
Explanation for CAT 2020 Slot 1 QA question 15

Q16:

CAT 2019 Slot 2

Indices

Medium

If 5x−3y=134385^{x}-3^{y}=13438 and 5x−1+3y+1=96865^{x-1}+3^{y+1}=9686, then x+yx+y equals

Q17:

CAT 2019 Slot 1

Indices

Medium

If (5.55)x=(0.555)y=1000(5.55)^x= (0.555)^y = 1000, then the value of 1x−1y\frac{1}{x} - \frac{1}{y} is

Answer options
Option 4
Correct Answer
Explanation for CAT 2019 Slot 1 QA question 17

Q18:

CAT 2019 Slot 1

Indices

Medium

If mm and nn are integers such that (2)1934429m8n=3n16m(644)(\sqrt{2})^{19} 3^{4} 4^{2} 9^m8^n = 3^n 16^m (\sqrt[4]{64}) then mm is

Answer options
Option 4
Correct Answer
Explanation for CAT 2019 Slot 1 QA question 18

Q19:

CAT 2018 Slot 1

Indices

Medium

Given that x2018y2017=1/2x^{2018}y^{2017} = 1/2 and x2016y2019=8x^{2016}y^{2019} = 8, the value of x2+y3x^2 + y^3 is

Answer options
Option 1
Correct Answer
Explanation for CAT 2018 Slot 1 QA question 19

Q20:

CAT 2017 Slot 2

Indices

Medium

If 9x−12−22x−2=4x−32x−39^{x-\frac{1}{2}} - 2^{2x-2} = 4^x - 3^{2x-3}, then x is

Answer options
Option 1
Correct Answer
Explanation for CAT 2017 Slot 2 QA question 20

Q21:

CAT 2017 Slot 1

Indices

Medium

If 92x−1−81x−1=19449^{2 x-1}-81^{x-1}=1944, then xx is

Answer options
Option 2
Correct Answer
Explanation for CAT 2017 Slot 1 QA question 21