GATE Practice Question and Answer
8Q: I will disappear every time you say my name. What am I? 1759 05b5cc6a1e4d2b4197774caf4
5b5cc6a1e4d2b4197774caf4- 1Thieffalse
- 2Silencetrue
- 3Shadowfalse
- 4Nonefalse
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Answer : 2. "Silence"
Explanation :
Answer: B) Silence Explanation:
Q: The average age of 80 boys in a class is 15. The average age of group of 15 boys in the class is 16 and the average of another 25 boys in the class is 14. What is the average age of the remaining boys in the class ? 1759 05b5cc736e4d2b4197774f883
5b5cc736e4d2b4197774f883- 112.24 yrsfalse
- 213.25 yrsfalse
- 316 yrsfalse
- 415.25 yrstrue
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Answer : 4. "15.25 yrs"
Explanation :
Answer: D) 15.25 yrs Explanation: Total ages of 80 boys = 15 x 80 = 1200 yrs.Total age of 16 boys = 15 x 16 = 240 yrsTotal age of 25 boys = 14 x 25 = 350 yrs.Average age of remaining boys = 1200 - (240+350) / 80 - (25+15) = 610/41 = 15.25 yrs.
Q: A take twice as much time as B or thrice as much time to finish a piece of work. Working together, they can finish the work in 2 days. B can do the work alone in ? 1759 05b5cc6dbe4d2b4197774e927
5b5cc6dbe4d2b4197774e927- 18 hrsfalse
- 212 hrsfalse
- 36 hrstrue
- 44 hrsfalse
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Answer : 3. "6 hrs"
Explanation :
Answer: C) 6 hrs Explanation: Suppose A, B and C take x, x/2 and x/3 respectively to finish the work. Then, (1/x + 2/x + 3/x) = 1/2 => 6/x = 1/2 => x = 12 So, B takes 6 hours to finish the work.
Q: Which is the largest coal producing country in the World? 1758 05b5cc6b9e4d2b4197774d6fd
5b5cc6b9e4d2b4197774d6fd- 1Indiafalse
- 2Chinatrue
- 3Russiafalse
- 4New-zealandfalse
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Answer : 2. "China"
Explanation :
Answer: B) China Explanation: China has been by far the biggest coal producing country over the last three decades. The country produced about 3.6 billion tonnes (Bt) of coal in 2012 accounting for over 47% of the world's total coal output.
Q: What will come in the place of the (?) in the following number series ? 5 14 45 130 (?) 1182 1757 05b5cc6cae4d2b4197774e095
5b5cc6cae4d2b4197774e095- 1222false
- 2397true
- 3404false
- 4415false
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Answer : 2. "397"
Explanation :
Answer: B) 397 Explanation: The pattern of given series is : 5 14 = (5x3) - 1 45 = (14x3) + 3 130 = (45x3) - 5 (?) = (130x3) + 7 => (?) = 397 1182 = (397x3) - 9 Thus, the missing number is 397.
Q: What is a Common Multiple? 1757 05b5cc6b5e4d2b4197774d548
5b5cc6b5e4d2b4197774d548- Show AnswerHide Answer
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Answer :
Explanation :
If the Multiples for two or more numbers which are Common, then those Multiples are said to be Common Multiples. For Example : Multiples of 3 are 3, 6, 9, 12, 15, 18, 21, 24, 27, 30,... Multiples of 5 are 5, 10, 15, 20, 25, 30,... Here common multiples of 3 & 5 upto 30 are 15, 30.
Q: The length of a rectangular plot is increased by 50%, to keep its area unchanged, the width of the plot should be decreased by ______? 1756 05b5cc6bce4d2b4197774d8ca
5b5cc6bce4d2b4197774d8ca- 129.87%false
- 233.33%true
- 322.22%false
- 419.5%false
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Answer : 2. "33.33%"
Explanation :
Answer: B) 33.33% Explanation: % Decrease in Width = 50150x100 = 33.33%
Q: Orkut’s creator Buyukkokten has launched a new social network called ________, which is available on mobile only. 1753 05b5cc6dde4d2b4197774e9f6
5b5cc6dde4d2b4197774e9f6- 1Callerfalse
- 2Hellotrue
- 3Hifalse
- 4Hayfalse
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Answer : 2. "Hello"
Explanation :
Answer: B) Hello Explanation: Orkut’s creator Buyukkokten has launched a new social network called Hello, which is available on mobile only. The Hello.com app is available on Android and iOS in the following countries: US, Canada, Britain, France, Australia, Brazil, Ireland. Germany, Mexico and India are next on the list and the app should be available this month.