IIT JEE Practice Question and Answer
8Q: John sells his laptop to Mark at a loss of 20% who subsequently sells it to Kevin at a profit of 25%. Kevin after finding some defect in the laptop, returns it to Mark but could recover only Rs.4.50 for every Rs. 5 he had paid. Find the amount of Kevin’s loss if John had paid Rs. 1,75,000 for the laptop ? 4227 05b5cc75ce4d2b4197774fc84
5b5cc75ce4d2b4197774fc84- 1Rs.16,500false
- 2Rs.17,500true
- 3Rs.14,200false
- 4Rs.15,520false
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Answer : 2. "Rs.17,500"
Explanation :
Answer: B) Rs.17,500 Explanation: Let’s assume John bought the laptop for Rs. 100He then sells it to Mark at a loss of 20% => Rs. 80,Who consequently sells it to Kevin at a profit of 25% => Rs. 100Then, Kevin sells it back to Mark for Rs. 90 (Rs.4.50 for every Rs. 5 that he had paid initially), so he suffers a loss of Rs. 10Therefore, for Rs. 100 there is a loss of Rs. 10,Then for Rs. 1,75,000 there will be a loss of Rs. 17,500.
Q: Find out which part of a sentence has an error and mark the answer corresponding to the appropriate letter (A, B, C). If a sentence is free from errors, mark (D) as the answer. He flew( 4212 05b5cc6d6e4d2b4197774e69d
5b5cc6d6e4d2b4197774e69d- 1/ over extensively(false
- 2C). If a sentence is free from errors, mark (D) as the answer. He flew(A) / over extensively(B)true
- 3. If a sentence is free from errors, mark (false
- 4as the answer. He flew(A) / over extensively(B) / the pacific last winter(C) / No error(D)false
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Answer : 2. "C). If a sentence is free from errors, mark (D) as the answer.
He flew(A) / over extensively(B)"
Explanation :
Answer: B) B Explanation: 'Extensively' is describing the verb 'flew' and should be placed after the verb and thus the correct phrase should be 'extensively over'. The error is in the second part of the sentence.
Q: दो धनात्मक संख्याओं का अनुपात 3 : 5 है और संख्या का औसत 48 है। संख्याओं का गुणनफल क्या है? 4207 15b5cc607e4d2b4197774b558
5b5cc607e4d2b4197774b558- 13365false
- 22160true
- 31854false
- 41632false
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Answer : 2. "2160"
Explanation :
Answer: B) 2160 स्पष्टीकरण: माना संख्या 3p और 5p ATQ, 8p = 2 x 48 p = 96/8 p = 12 संख्याएँ 36 और 60 हैं। इसलिए, संख्याओं का गुणनफल = 36 x 60 = 2160।
Q: दी गई संख्या श्रंखला में से विषम को चुनिए? 21, 24, 33, 49, 74 49 4202 05b5cc604e4d2b4197774b4c9
5b5cc604e4d2b4197774b4c9- 121true
- 224false
- 333false
- 449false
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Answer : 1. "21"
Explanation :
Answer: A) 21 व्याख्या: दी गई संख्या श्रृंखला एक पैटर्न का अनुसरण करती है, 19 + 12 = 20 (21 नहीं) 20 + 22 = 2424 + 32 = 3333 + 42 = 4949 + 52 = 74 इसलिए, दी गई संख्या श्रृंखला में विषम संख्या 21 है।
Q: Which is a green planet in the solar system? 4198 05b5cc6a2e4d2b4197774cb5b
5b5cc6a2e4d2b4197774cb5b- 1Plutofalse
- 2Venusfalse
- 3Uranustrue
- 4Marsfalse
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Answer : 3. "Uranus"
Explanation :
Answer: C) Uranus Explanation: Uranus is the seventh planet from the Sun which looks green color. It has the third-largest planetary radius and fourth-largest planetary mass in the Solar System. Uranus is similar in composition to Neptune, and both have different bulk chemical composition from that of the larger gas giants Jupiter and Saturn. Colors of other planets:: Mercury - Gray or slightly brownish Venus - Pale yellow Earth - Blue with white clouds Mars - Mostly reddish brown Jupiter - Orange and white bands Saturn - Pale gold Uranus - Green Neptune - Pale blue Pluto - Light brown
Q: Which observation proves that a cell is a eukaryote? 4198 05b5cc6a0e4d2b4197774ca60
5b5cc6a0e4d2b4197774ca60- 1It contains DNAfalse
- 2It contains ribosomesfalse
- 3It has a cell membranefalse
- 4It has DNA inside a nucleustrue
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Answer : 4. "It has DNA inside a nucleus"
Explanation :
Answer: D) It has DNA inside a nucleus Explanation: Eukaryotic cells all have a nucleus. Eukaryotes are organisms that are multicellular, although there are some examples of single cellular eukaryotes. So eukaryotic cells can be either cell with a nucleus or a eukaryotic organism's cell. The most important feature to judge whether it has nucleus membrane. And for other choices, they are the common features of eukaryote and prokaryote.
Q: At 6′o clock a clock ticks 6 times. The time between first and last ticks is 30 seconds. How long does it tick at 12′o clock ? 4194 05b5cc731e4d2b4197774f7ec
5b5cc731e4d2b4197774f7ec- 166 sectrue
- 255 secfalse
- 336 secfalse
- 424 secfalse
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Answer : 1. "66 sec"
Explanation :
Answer: A) 66 sec Explanation: For ticking 6 times, there are 5 intervals. Each interval has time duration of 30/5 = 6 secs At 12 o'clock, there are 11 intervals,so total time for 11 intervals = 11 x 6 = 66 secs.
Q: A man swims downstream 72 km and upstream 45 km taking 9 hours each time; what is the speed of the current ? 4182 05b5cc6e2e4d2b4197774ec52
5b5cc6e2e4d2b4197774ec52- 11 kmphfalse
- 23.2 kmphfalse
- 31.5 kmphtrue
- 42 kmphfalse
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Answer : 3. "1.5 kmph"
Explanation :
Answer: C) 1.5 kmph Explanation: 72 --- 9 ? ---- 1 => Down Stream = 8 45 ---- 9 ? ---- 1 => Up Stream = 5 Speed od current S = ? S = (8 - 5)/2 = 1.5 kmph.