GATE Practice Question and Answer
8Q: which of the following are chemical changes? 1978 05b5cc6a7e4d2b4197774ce09
5b5cc6a7e4d2b4197774ce09- 1Cooking of Foodtrue
- 2Digestion of Foodfalse
- 3Freezing of waterfalse
- 4Water is heated upfalse
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Answer : 1. "Cooking of Food"
Explanation :
Answer: A) A & B Explanation: A) Cooking of Food ------ Chemical Change B) Digestion of Food ----- Chemical Change C) Freezing of water ----- Physical Change D) Water is heated up ---- Physical Change because here the chemical composition of the substance changes in A & B only. Since we know that, If the chemical composition is changing then it is a chemical change and if the chemical composition is remaining the same, then it is a physical change.
Q: The price of an article has been reduced by 35%. In order to restore the original price the new price must be increased by ? 1978 05b5cc6dfe4d2b4197774eae4
5b5cc6dfe4d2b4197774eae4- 151.8 %false
- 249.25 %false
- 347.2 %false
- 453.84 %true
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Answer : 4. "53.84 %"
Explanation :
Answer: D) 53.84 % Explanation: 100 65 -------65 ------- 35100 ------ ? => 53.84 %
Q: What is the value of KL ? Statement A: K2= 4.Statement B: L = 0. 1976 05b5cc6d2e4d2b4197774e451
5b5cc6d2e4d2b4197774e451- 1Only A is sufficientfalse
- 2Only B is sufficienttrue
- 3Both (A) and (B) are sufficientfalse
- 4A) and (B) are sufficient D)false
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Answer : 2. "Only B is sufficient"
Explanation :
Answer: B) Only B is sufficient Explanation: From statement B, As the value of L = 0, the value of KL = 0. Hence only statement B is sufficient.
Q: 'K' cycled from A to B at 10 kmph and returned at the rate of 9 kmph. 'L' cycled both ways at 12 kmph. In the whole journey 'L' took 10 minutes less than 'K'. Find the distance between A and B ? 1976 05b5cc74fe4d2b4197774faef
5b5cc74fe4d2b4197774faef- 132.1 kmfalse
- 215.23 kmfalse
- 33.75 kmtrue
- 432.1 mfalse
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Answer : 3. "3.75 km"
Explanation :
Answer: C) 3.75 km Explanation: Let 'd' be the distance between A and BK -time = d/10 + d/9 = 19d/90 hoursL -time = 2d/12 = d/6 hoursWe know that, 10 min = 1/6 hoursThus, time difference between K and L is given as 10 minutes. => 19d/90 - d/6 = 1/6=> (19d-15d)/90 = 1/6=> 4d/90 = 1/6Thus,d= 15/4 km = 3.75 km. hence the distance between A and B is 3.75 km.
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Answer :
Explanation :
9 P in SS is a short form for 9 Planets i Solar System. There are many more of this kind. Some of them are: 1. 7 C in a R - 7 Colours in a Rainbow 2. 90 D in a R A - 90 Degrees in a Right Angle 3. 52 W in a Y - 52 Weeks in a Year 4. 5 C in an OF 5. 12 S of the Z
Q: The ratio of the angles of a triangle is 3 : 4 : 5. The three angles of a quadrilateral is equal to three angles of this triangle. What is the sum of the largest angle and second smallest angle of the quadrilateral ? 1975 05b5cc6cae4d2b4197774dfd9
5b5cc6cae4d2b4197774dfd9- 1225 degtrue
- 2210 degfalse
- 3205 degfalse
- 4245 degfalse
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Answer : 1. "225 deg"
Explanation :
Answer: A) 225 deg Explanation: Angle of triangle = 180 × 3/12 = 45 deg Other angles of the triangle are = 60 deg, 75 deg Angle of quadrilateral = 360 - (45 + 60 + 75) = 180 deg Therefore, the four angles of the quadrilateral are 45, 60, 75 & 180 degrees. Hence, the sum of largest and smallest angle of the quadrilateral are 180 + 45 = 225 deg.
Q: A train travels 325 km in 3.5 hours and 470 km in 4 hours. Find the average speed of train ? 1975 05b5cc764e4d2b4197774fd99
5b5cc764e4d2b4197774fd99- 1107 kmphfalse
- 2106 kmphtrue
- 372 kmphfalse
- 476 kmphfalse
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Answer : 2. "106 kmph"
Explanation :
Answer: B) 106 kmph Explanation: As we know that Speed = Distance / Timefor average speed = Total Distance / Total Time TakenThus, Total Distance = 325 + 470 = 795 kmThus, Total Speed = 7.5 hrsAverage Speed = 795/7.5 => 106 kmph.
Q: In the question below consists of a question and two statements numbered a and b given below it. You have to decide whether the data provided in the statements are sufficient to answer the question. Read both the statements and give the answer. Question: In which year was Kalyan born ?Statements:a. Kalyan at present is 15 years younger to his mother.b. Kalyan's brother, who was born in 1991, is 25 years younger to his mother. 1974 05b5cc76ae4d2b4197774fe66
5b5cc76ae4d2b4197774fe66- 1b alone is sufficient while a alone is not sufficientfalse
- 2a alone is sufficient while b alone is not sufficientfalse
- 3Both a and b are sufficienttrue
- 4Neither a nor b is sufficientfalse
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Answer : 3. "Both a and b are sufficient"
Explanation :
Answer: C) Both a and b are sufficient Explanation: From both a and b, we find that Kalyan is (25 - 15) = 10 years older than his brother, who was born in 1991. So, Kalyan was born in 1981.