CAT Practice Question and Answer
8Q: In a row, Kumar is at 7th place from the left and Pawan is at 9th place from the right. When they interchange the positions Kumar becomes 11th from left. How many were seated in the row ? 3614 05b5cc70ee4d2b4197774f385
5b5cc70ee4d2b4197774f385- 119true
- 220false
- 321false
- 427false
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Answer : 1. "19"
Explanation :
Answer: A) 19 Explanation: Initialy from left 7th = kumarfrom right 9th = pawanInterchange kumar = 11th from left, from right kumar = 9th;11+8 = 19;8 is 1,2,3,4,5,6,7(pawan),8,9,10,11(kumar),12,13,14,15,16,17,18,19;simply count the 9th place from right we will get total as 19.
Q: A and B invests Rs.10000 each, A investing for 8 months and B investing for all the 12 months in the year. If the total profit at the end of the year is Rs.25000, find their shares? 3607 05b5cc7bbe4d2b419777509cd
5b5cc7bbe4d2b419777509cd- 110000 and 15000true
- 215000 and 10000false
- 35000 and 20000false
- 420000 and 5000false
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Answer : 1. "10000 and 15000"
Explanation :
Answer: A) 10000 and 15000 Explanation: As both A and B invest the same amounts, the ratio of their profits at the end of the year is equal to the ratio of the time periods for which they have invested. Thus, the required ratio of their profits = A : B = 8 : 12 = 2 : 3. Hence, share of A in the total profit = 2 x 25000/5 = Rs.10000 Similarly, share of B in the total profit = 3 x 25000/5 = Rs.15000
Q: Ten years ago, Kumar was thrice as old as Sailesh was but 10 years hence, he will be only twice as old. Find Kumar’s present age ? 3605 05b5cc77fe4d2b419777501a6
5b5cc77fe4d2b419777501a6- 150 yearsfalse
- 270 yearstrue
- 360 yearsfalse
- 440 yearsfalse
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Answer : 2. "70 years"
Explanation :
Answer: B) 70 years Explanation: Let Kumar’s present age be "x" years and Sailesh’s present age be "y" years.Then, according to the first condition, x - 10 = 3(y - 10) => x - 3y = - 20 ........(1) Now, Kumar’s age after 10 years = (x + 10) years. Sailesh’s age after 10 years = (y + 10) years. (x + 10) = 2 (y + 10) => x - 2y = 10 ......(2) Solving (1) and (2), we get x = 70 and y = 30 Kumar’s present age = 70 years and Sailesh’s present age = 30 years.
Q: What is the name of the virus that fool a user into downloading and executing them by pretending to be useful applications ? 3604 25b5cc6d1e4d2b4197774e3fc
5b5cc6d1e4d2b4197774e3fc- 1Trojan horsestrue
- 2Keyloggerfalse
- 3Wormfalse
- 4File virusfalse
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Answer : 1. "Trojan horses"
Explanation :
Answer: A) Trojan horses Explanation:
Q: Suresh introduces a man as " He is the son of the woman who is the mother of the husband of my mother ". How is Suresh related to the man ? 3602 05b5cc6f1e4d2b4197774ef5e
5b5cc6f1e4d2b4197774ef5e- 1Son-in-lawfalse
- 2Cousinfalse
- 3Fatherfalse
- 4Sontrue
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Answer : 4. "Son"
Explanation :
Answer: D) Son Explanation:
Q: A thief steals half the total number of loaves of bread plus 1/2 loaf from a bakery. A second thief steals half the remaining number of loaves plus 1/2 loaf and so on. After the 5th thief has stolen there are no more loaves left in the bakery. What was the total number of loaves did the bakery have at the beginning ? 3591 05b5cc70ee4d2b4197774f33c
5b5cc70ee4d2b4197774f33c- 121false
- 211false
- 317false
- 431true
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Answer : 4. "31"
Explanation :
Answer: D) 31 Explanation: Let y be the total number of loavesa be the remaining loaves after 1st thiefb be the remaining loaves after 2nd thiefand c, d..so on after 3 and 4 the = 0 be the remaining loaves after 5th thief a = y - (y/2 + 1/2)= y/2 - 1/2 b = a - (a/2 + 1/2)= a/2 - 1/2 c = b - (b/2 + 1/2)= b/2 - 1/2 d = c - (c/2 + 1/2)= c/2 - 1/2 e = d - (d/2 + 1/2)= d/2 - 1/2we know that, e = 0,thus by substitution, we getd = 1c = 3b = 7a = 15y = 31Therefore total number of bread loaves in bakery was 31.
Q: When water freezes its density 3591 05b5cc6a1e4d2b4197774cb08
5b5cc6a1e4d2b4197774cb08- 1decreasestrue
- 2remains constantfalse
- 3increasesfalse
- 4become zerofalse
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Answer : 1. "decreases"
Explanation :
Answer: A) decreases Explanation: When water freezes its density decreases. Water at ordinary temperatures contracts and increases in density as it is cooled, like most substances. But at about 4°C it reaches a maximum density and then decreases in density as it approaches the freezing point.
Q: The famous book Kankal is authored by ? 3591 15b5cc6e5e4d2b4197774ed51
5b5cc6e5e4d2b4197774ed51- 1Ketan Bhagatfalse
- 2Mahesh Raofalse
- 3Nirmal Vermafalse
- 4Jaishankar Prasadtrue
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Answer : 4. "Jaishankar Prasad"
Explanation :
Answer: D) Jaishankar Prasad Explanation: