IIT JEE Practice Question and Answer

Q: A boatman can row 96 km downstream in 8 hr. If the speed of the current is 4 km/hr, then find in what time he will be able to cover 8 km upstream ? 4189 0

  • 1
    1.5 hrs
    Correct
    Wrong
  • 2
    1 hrs
    Correct
    Wrong
  • 3
    2.5 hrs
    Correct
    Wrong
  • 4
    2 hrs
    Correct
    Wrong
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Answer : 4. "2 hrs"
Explanation :

Answer: D) 2 hrs Explanation: Speed in downstream = 96/8 = 12 kmph Speed of current = 4 km/hr Speed of the boatman in still water = 12 – 4 = 8 kmph Speed in upstream = 8 – 4 = 4 kmph Time taken to cover 8 km upstream = 8/4 = 2 hours.

Q: In how many years, Rs. 200 will produce the same interest @ 5 % as Rs. 900 produce in 2 years @ 3 ½ %  ? 4174 0

  • 1
    5.2 yrs
    Correct
    Wrong
  • 2
    7 yrs
    Correct
    Wrong
  • 3
    7.9 yrs
    Correct
    Wrong
  • 4
    6.3 yrs
    Correct
    Wrong
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Answer : 4. "6.3 yrs"
Explanation :

Answer: D) 6.3 yrs Explanation: P = Rs. 900, R = 3 ½ % = 7/2 %, T = 2 years.  Therefore,  S.I. = PTR/100 S.I. = Rs. (900 x 7/2 x 2/100) = Rs. 63 Now, P = Rs. 200, S.I. = Rs. 63, R = 5 % Time = ((100 x 63) / (200 x 5) ) years = 6.3 years.

Q: In a certain code language, 'how can you go' is written as 'ja da ka pa', 'can you come here' is written as 'na ka sa ja' and 'cone and go' is written as 'ra pa sa'. How is 'here' written in that code ? 4172 0

  • 1
    na
    Correct
    Wrong
  • 2
    ja
    Correct
    Wrong
  • 3
    sa
    Correct
    Wrong
  • 4
    None
    Correct
    Wrong
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Answer : 1. "na"
Explanation :

Answer: A) na Explanation: From the given information : how can you go = ja da ka pa....(1)can you come here = na ka sa ja...(2)come and go = ra pa sa....(3)from (1)&(2), can you = ja ka...(4)from (2)&(3), come = sa...(5)Using (4)&(5) in (2), we get here = na.

Q: Five men and nine women can do a piece of work in 10 days. Six men and twelve women can do the same work in 8 days. In how many days can three men and three women do the work  ? 4170 0

  • 1
    18 days
    Correct
    Wrong
  • 2
    20 days
    Correct
    Wrong
  • 3
    16 days
    Correct
    Wrong
  • 4
    14 days
    Correct
    Wrong
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Answer : 2. "20 days"
Explanation :

Answer: B) 20 days Explanation: (5m + 9w)10 = (6m + 12w)8  => 50m + 90w = 48w + 96 w    => 1m = 3w 5m + 9w = 5m + 3m = 8m   8 men can do the work in 10 days. 3m +3w = 3m + 1w = 4m So, 4 men can do the work in (10 x 8)/4 = 20 days.

Q: A can write 32 pages in 6 hours and B can write 40 pages in 5 hours. If they write together, in how many hours they can write 110 pages ? 4168 0

  • 1
    7 hrs
    Correct
    Wrong
  • 2
    6 hrs 10 min
    Correct
    Wrong
  • 3
    5 hrs 25min
    Correct
    Wrong
  • 4
    8 hrs 15 min
    Correct
    Wrong
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Answer : 4. "8 hrs 15 min"
Explanation :

Answer: D) 8 hrs 15 min Explanation: A can write in 1hour = 32/6 pages Similarly, B in 1 hour = 40/5 pages Together (A+B) in 1 hour = 32/6 + 40/5 = 40/3 So, A+B write 40/3 pages in 1 hour A+B write 110 pages in (3/40) x 110 Hours = 8 hours 15 min.

Q: A hater of knowledge and learning is 4163 0

  • 1
    Philologist
    Correct
    Wrong
  • 2
    Misologist
    Correct
    Wrong
  • 3
    Bibliophile
    Correct
    Wrong
  • 4
    Misogynist
    Correct
    Wrong
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Answer : 2. "Misologist"
Explanation :

Answer: B) Misologist Explanation: The one word substitution for a hater of knowledge and learning is Misologist.

Q: Soil erosion on hillslopes can be checked by 4153 0

  • 1
    Terrace cultivation
    Correct
    Wrong
  • 2
    Contour ploughing
    Correct
    Wrong
  • 3
    Afforestation
    Correct
    Wrong
  • 4
    Strip cropping
    Correct
    Wrong
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Answer : 1. "Terrace cultivation"
Explanation :

Answer: A) Terrace cultivation Explanation: Hence, soil erosion on hillslopes can be checked by Terrace cultivation.

Q: Which of the Phrases(1), (2), (3) and (4) given below each sentence should replace the phrases printed in bold in the sentence to make it grammatically correct. The ban is applied by the district’s commercial taxes department after protests by a community, which had threat to burn theatres screening the controversial movie. 4146 0

  • 1
    had threated to burn
    Correct
    Wrong
  • 2
    had threatened to burn
    Correct
    Wrong
  • 3
    had threatened to burning
    Correct
    Wrong
  • 4
    had threats of burning
    Correct
    Wrong
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Answer : 2. "had threatened to burn"
Explanation :

Answer: B) had threatened to burn Explanation:

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