GATE Practice Question and Answer
8Q: How many Earth- sized Exoplanets have been discovered by NASA around a single star in February 2017 ? 1343 05b5cc736e4d2b4197774f874
5b5cc736e4d2b4197774f874- 114false
- 27true
- 36false
- 411false
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Answer : 2. "7"
Explanation :
Answer: B) 7 Explanation: NASA announced a Seven new system of Exoplanets, which are Earth-size, and could potentially hold life.These exoplanets are located outside of our solar system and orbit a star. NASA has named the system of planets after the ‘Transiting Planets and Planetesimals Small Telescope,’ which is located in Chile. This telescope first discovered three of the planets in this system in May 2016. Unlike Earth, which rotates on its axis, the planets are “tidally locked to the star.” This means that one side of the planet has only day, and one side has only night. It also means the weather conditions are unlike what we experience on Earth.
Q: Whether the last number 240 in the following series is according to the remaining numbers pattern ? 2, 4, 12, 48, 240 1340 05b5cc6c0e4d2b4197774daf8
5b5cc6c0e4d2b4197774daf8- 1TRUEtrue
- 2FALSE Answer & Explanation Answer:false
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Answer : 1. "TRUE"
Explanation :
Answer: A) TRUE Explanation: The given series follows, 2 2 x 2 = 4 4 x 3 = 12 12 x 4 = 48 48 x 5 = 240.
Q: Everyone has it and no one can lose it. What is it? 1338 05b5cc69fe4d2b4197774ca1e
5b5cc69fe4d2b4197774ca1e- 1Facefalse
- 2Teethfalse
- 3Hairfalse
- 4Shadowtrue
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Answer : 4. "Shadow"
Explanation :
Answer: D) Shadow Explanation:
Q: 36 of what number is 18? 1338 05b5cc697e4d2b4197774c604
5b5cc697e4d2b4197774c604- 138false
- 242false
- 350true
- 462false
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Answer : 3. "50"
Explanation :
Answer: C) 50 Explanation: Let the required number be 'p' 36 of what number is 18 implies 36% of p = 18 => 36 x p/100 = 18 => p = 1800/36 => p = 50. Hence, 36% of 50 is 18.
Q: What value will come in place of question mark (?) in following number series? 12, 16, 32, 68, ? 1336 05b5cc6bee4d2b4197774d9c4
5b5cc6bee4d2b4197774d9c4- 1198false
- 2164false
- 3132true
- 4118false
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Answer : 3. "132"
Explanation :
Answer: C) 132 Explanation: Given series is 12 16 32 68 ? Here it follows a pattern that, 12 12 + (2x2) = 16 16 + (4x4) = 32 32 + (6x6) = 68 68 + (8x8) = 132
Q: A certain amount earns simple interest of Rs. 2260 after 3 years. Had the interest been 1 % more how much more interest would it have earned ? 1336 05b5cc6c1e4d2b4197774db78
5b5cc6c1e4d2b4197774db78- 1Rs. 175false
- 2Rs. 220.75false
- 3Rs. 126false
- 4Can't be determinedtrue
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Answer : 4. "Can't be determined"
Explanation :
Answer: D) Can't be determined Explanation: Here given Interest earned = Rs. 2260 Time = 3 years Rate of interest = ? Principal Amount = ? So, it can't be determined.
Q: A boat whose speed in still water is 9 kmph, goes 12 km downstream and comes back in 3 hrs. Find the speed of the stream? 1334 05b5cc6bfe4d2b4197774da7e
5b5cc6bfe4d2b4197774da7e- 11 kmphfalse
- 23 kmphtrue
- 35 kmphfalse
- 44 kmphfalse
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Answer : 2. "3 kmph"
Explanation :
Answer: B) 3 kmph Explanation: Let the speed of the stream = x kmph From the given data, 129+x+129-x=3 hrs 3x2 = 27 => x = 3 kmph Therefore, the speed of the stream = 3 kmph
Q: A can do a work in 9 days, B can do a work in 7 days, C can do a work in 5 days. A works on the first day, B works on the second day and C on the third day respectively that is they work on alternate days. When will they finish the work ? 1334 05b5cc73de4d2b4197774f94d
5b5cc73de4d2b4197774f94d- 1[7 + (215/345)] daysfalse
- 2[6 + (11/215)] daysfalse
- 3[6 + (261/315)] daystrue
- 4[5 + (112/351)] daysfalse
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Answer : 3. "[6 + (261/315)] days"
Explanation :
Answer: C) [6 + (261/315)] days Explanation: After day 1, A finishes 1/9 of the work. After day 2, B finishes 1/7 more of the total work. (1/9) + (1/7) is finished. After day 3, C finishes 1/5 more of total work. Total finished is 143/315. So, after day 6, total work finished is 286/315. Now remaining work = 29 /315 On day 7, A will work again Work will be completed on day 7 when A is working. He must finish 29/315 of total remaining work. Since he takes 9 days to finish the total task, he will need 261/315 of the day. Total days required is 6 + (261/315) days.