IIT JEE Practice Question and Answer
8Q: Is a square a rhombus? 2358 05b5cc67ee4d2b4197774c250
5b5cc67ee4d2b4197774c250- 1TRUEtrue
- 2FALSE Answer & Explanation Answer:false
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Answer : 1. "TRUE"
Explanation :
Answer: A) TRUE Explanation: Yes, a square is a rhombus. But a rhombus is not a square unless the interior angles are at right angles. We know that, a square is a quadrilateral with all sides equal and all the interior angles are 90 deg i.e, at right angles. Whereas a rhombus is also a quadrilateral with all sides equal but the interior angles are not at right angles. Hence, if the interior angles of a rhombus are all at right angles (90 deg), then it is square.
Q: The first 8 alphabets are written down at random. what is the probability that the letters b,c,d,e always come together ? 2358 05b5cc6d3e4d2b4197774e4d7
5b5cc6d3e4d2b4197774e4d7- 11/7false
- 28!false
- 37!false
- 41/14true
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Answer : 4. "1/14"
Explanation :
Answer: D) 1/14 Explanation: The 8 letters can be written in 8! ways.n(S) = 8!Let E be the event that the letters b,c,d,e always come together when the first 8 alphabets are written down.Now the letters a, (bcde), f, g and h can be arranged in 5! ways.The letters b,c,d and e can be arranged themselves in 4! ways.n(E) = 5! x 4!Now, the required P(E) = n(E)/n(S) = 5! x 4!/8! = 1/14Hence the answer is 1/14.
Q: Which of the following are true of meditation in buddhism? 2357 05b5cc61ee4d2b4197774b763
5b5cc61ee4d2b4197774b763- 1Right concertation is reached through meditationfalse
- 2It can involve concetration on your breathingfalse
- 3It can mean visualizing certain thingsfalse
- 4All of the abovetrue
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Answer : 4. "All of the above"
Explanation :
Answer: D) All of the above Explanation:
Q: Which statement best compares a line and a point? 2357 05b5cc622e4d2b4197774b7bf
5b5cc622e4d2b4197774b7bf- 1A point has no dimension and a line has one dimension.true
- 2A line can have line segments on it whereas a point cannot be on any line segment.false
- 3point is a location whereas a line has several planes located on itfalse
- 4A line can lie on a plane whereas a point cannot lie on a plane.false
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Answer : 1. "A point has no dimension and a line has one dimension."
Explanation :
Answer: A) A point has no dimension and a line has one dimension. Explanation: A point has no dimension and a line has one dimension is the statement that best compares a line and a point.
Q: Plants synthesis protein from 2357 05b5cc68ee4d2b4197774c406
5b5cc68ee4d2b4197774c406- 1amino acidstrue
- 2starchfalse
- 3fatty acidsfalse
- 4sugarfalse
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Answer : 1. "amino acids"
Explanation :
Answer: A) amino acids Explanation: It is the fact that all type of proteins are polymers of amino acids. So that, plants are also used to synthesise protein from amino acids. Plants synthesis protein from amino acids in the presence of ATP by specific synthetases. This reaction is followed by the attachment of these activated amino acids to specific tRNA molecules, with the formation of aminoacyl-tRNA molecules.
Q: A man saves Rs. 200 in each of the first three months of his service. In each of the subsequent months his saving increases by Rs. 40 more than the saving of immediately previous month. His total saving from the start of service will be Rs. 11040 after ? 2353 05b5cc71ee4d2b4197774f5b8
5b5cc71ee4d2b4197774f5b8- 119 monthsfalse
- 221 monthstrue
- 318 monthsfalse
- 420 monthsfalse
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Answer : 2. "21 months"
Explanation :
Answer: B) 21 months Explanation: Total savings = 200 + 200 + 200 + 240 + 280 + ... to n months = 11040 = 120 + 80 + 160 + 40 + 200 + 240 + ....n terms= 40 + 80 + 120 + 160 + 200 + 240 + ...n terms= n/2[2a + (n-1)d] + 80 + 40 = 11040= n/2[240 + (n-1)40] = 10920= n[6+n-1] = 546= n[n+5] = 546n = 21
Q: Which of the following is generally true about the stratosphere? 2352 05b5cc6a8e4d2b4197774ce80
5b5cc6a8e4d2b4197774ce80- 1It is very drytrue
- 2It is very moistfalse
- 3The dryness level varies with the seasonfalse
- 4The dryness level varies with the moon cyclefalse
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Answer : 1. "It is very dry"
Explanation :
Answer: A) It is very dry Explanation: The stratosphere layer of the atmosphere is very dry.
Q: 5 C in an OF? 2352 05b5cc6aee4d2b4197774d18d
5b5cc6aee4d2b4197774d18d- 15 Cards in an Old Fanfalse
- 25 Circles in an Olympic Flagtrue
- 35 Colors in an Old Footballfalse
- 45 Colors in an Old Flagfalse
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Answer : 2. "5 Circles in an Olympic Flag"
Explanation :
Answer: B) 5 Circles in an Olympic Flag Explanation: 5 C in an OF denotes 5 Circles in an Olympic Flag. These are riddles of type 12 S of the Z 52 W in a Y.