CAT 2017Slot 2QAAll Questions

All 19 QA questions with detailed solutions and explanations.
Questions marked with this icon include a detailed solution explanation
Q1
Number SystemsMedium
The numbers 1, 2, ..., 9 are arranged in a 3 X 3 square grid in such a way that each number occurs once and the entries along each column, each row, and each of the two diagonals add up to the same value.
If the top left and the top right entries of the grid are 6 and 2, respectively, then the bottom middle entry is
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Q2
ArithmeticMedium
In a 10 km race, A, B, and C, each running at uniform speed, get the gold, silver, and bronze medals, respectively. If A beats B by 1 km and B beats C by 1 km, then by how many metres does A beat C?
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Q3
ArithmeticMedium
Arun drove from home to his hostel at 60 miles per hour. While returning home he drove half way along the same route at a speed of 25 miles per hour and then took a bypass road which increased his driving distance by 5 miles, but allowed him to drive at 50 miles per hour along this bypass road. If his return journey took 30 minutes more than his onward journey, then the total distance traveled by him is
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Q4
ArithmeticMedium
The average height of 22 toddlers increases by 2 inches when two of them leave this group. If the average height of these two toddlers is one-third the average height of the original 22, then the average height, in inches, of the remaining 20 toddlers is
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Q5
ArithmeticMedium
Mayank buys some candies for Rs 15 a dozen and an equal number of different candies for Rs 12 a dozen. He sells all for Rs 16.50 a dozen and makes a profit of Rs 150. How many dozens of candies did he buy altogether?
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Q6
ArithmeticMedium
In a village, the production of food grains increased by 40% and the per-capita production of food grains increased by 27% during a certain period. The percentage by which the population of the village increased during the same period is nearest to
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Q7
ArithmeticMedium
Consider three mixtures — the first having water and liquid A in the ratio 1:2, the second having water and liquid B in the ratio 1:3, and the third having water and liquid C in the ratio 1:4. These three mixtures of A, B, and C, respectively, are further mixed in the proportion 4: 3: 2. Then the resulting mixture has
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Q8
AlgebraMedium
If the product of three consecutive positive integers is 15600 then the sum of the squares of these integers is
Q9
AlgebraMedium
If x is a real number such that $\log_{3}5= \log_{5}(2 + x)$, then which of the following is true?
Q10
AlgebraMedium
The minimum possible value of the sum of the squares of the roots of the equation $x^2+(a+3)x-(a+5)=0$ is
Q11
AlgebraMedium
If $9^{x-\frac{1}{2}}-2^{2x-2}=4^{x}-3^{2x-3}$, then $x$ is
Q12
AlgebraMedium
If $log(2^{a}\times3^{b}\times5^{c} )$is the arithmetic mean of $log ( 2^{2}\times3^{3}\times5)$, $log(2^{6}\times3\times5^{7} )$, and $log(2 \times3^{2}\times5^{4} )$, then a equals
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Q13
AlgebraMedium
Let $a_{1},\ a_{2},\ a_{3},\ a_{4},\ a_{5}$ be a sequence of five consecutive odd numbers. Consider a new sequence of five consecutive even numbers ending with $2a_{3}$
If the sum of the numbers in the new sequence is 450, then $a_{5}$ is
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Q14
Number SystemsHard
How many different pairs(a,b) of positive integers are there such that $a\geq b$ and $\frac{1}{a}+\frac{1}{b}=\frac{1}{9}$?
Q15
Modern MathMedium
In how many ways can 8 identical pens be distributed among Amal, Bimal, and Kamal so that Amal gets at least 1 pen, Bimal gets at least 2 pens, and Kamal gets at least 3 pens?
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Q16
Modern MathHard
How many four digit numbers, which are divisible by 6, can be formed using the digits 0, 2, 3, 4, 6, such that no digit is used more than once and 0 does not occur in the left-most position?
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Q17
AlgebraMedium
Let $f(x) =2x-5$ and $g(x) =7-2x$. Then $|f(x)+ g(x)|$ = $|f(x)|+ |g(x)|$ if and only if
Q18
AlgebraMedium
An infinite geometric progression $a_1,a_2,...$ has the property that $a_n= 3(a_{n+1}+ a_{n+2} + ...)$ for every n $\geq$ 1. If the sum $a_1+a_2+a_3...+=32$, then $a_5$ is
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Q19
AlgebraMedium
If $a_{1}=\frac{1}{2\times5},a_{2}=\frac{1}{5\times8},a_{3}=\frac{1}{8\times11},...,$ then $a_{1}+a_{2}+a_{3}+...+a_{100}$ is