IIT JEE Practice Question and Answer

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Answer : 4. "9:1"
Explanation :

Answer: D) 9:1 Explanation: Milk = 3/5 x 20 = 12 liters, water = 8 liters   If 10 liters of mixture are removed, amount of milk removed = 6 liters and amount of water removed = 4 liters.   Remaining milk = 12 - 6 = 6 liters Remaining water = 8 - 4 = 4 liters   10 liters of pure milk are added, therefore total milk = (6 + 10) = 16 liters.   The ratio of milk and water in the new mixture = 16:4 = 4:1   If the process is repeated one more time and 10 liters of the mixture are removed, then amount of milk removed = 4/5 x 10 = 8 liters.   Amount of water removed = 2 liters.   Remaining milk = (16 - 8) = 8 liters. Remaining water = (4 -2) = 2 liters.   Now 10 lts milk is added => total milk = 18 lts   The required ratio of milk and water in the final mixture obtained   = (8 + 10):2 = 18:2 = 9:1.

Q: The main goal for farmers in 1900 was to 3034 0

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    Force the railroads to lower freight rates
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    Enable them to pay back their loans more easily
    Correct
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    Hold on to political and economic power.
    Correct
    Wrong
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    voters greater direct participation in government
    Correct
    Wrong
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Answer : 3. "Hold on to political and economic power."
Explanation :

Answer: C) Hold on to political and economic power. Explanation:

Q: Count the number of triangles and squares in the given figure. 3031 0

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    36 triangles, 7 Squares
    Correct
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    38 triangles, 9 Squares
    Correct
    Wrong
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    40 triangles, 7 Squares
    Correct
    Wrong
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    42 triangles, 9 Squares
    Correct
    Wrong
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Answer : 3. "40 triangles, 7 Squares"
Explanation :

Answer: C) 40 triangles, 7 Squares Explanation: The figure may be labelled as shown      Triangles :   The Simplest triangles are BGM, GHM, HAM, ABM, GIN, IJN, JHN, HGN, IKO, KLO, LJO, JIO, KDP, DEP, ELP, LKP, BCD and AFE i.e 18 in number   The triangles composed of two components each are ABG, BGH, GHA, HAB, HGI, GIJ, IJH, JHG, JIK, IKL, KLJ,LJI, LKD, KDE, DEL and ELK i.e 16 in number.   The triangles composed of four components each are BHI, GJK, ILD, AGJ, HIL and JKE i.e 6 in number.   Total number of triangles in the figure = 18 + 16 + 6 =40.   Squares :   The Squares composed of two components each are MGNH, NIOJ, and OKPL i.e 3 in number   The Squares composed of four components each are BGHA, GIJH, IKJL and KDEL i.e 4 in number   Total number of squares in the figure = 3 + 4 =7

Q: Which veda deals with medicine? 3030 0

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    Atharva Veda
    Correct
    Wrong
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    Yajur Veda
    Correct
    Wrong
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    Sama Veda
    Correct
    Wrong
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    Rig Veda
    Correct
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Answer : 1. "Atharva Veda"
Explanation :

Answer: A) Atharva Veda Explanation: The Vedas are considered the earliest literary record of Indo-Aryan civilization. It is the most sacred scriptures of India.   There are four Vedas in Hinduism. They are: 1. The Rig Veda, 2. Sama Veda, 3. Yajur Veda and 4. Atharva Veda. Most ailments, both physical and mental, were attributed to malevolent spirits and cures consisted of rituals, charms, mantras, medicines and surgical intervention. The hymns in the Atharva Veda, the last of the four Vedas, and largely composed after the Aryans were well settled in the sub-continent, indicate that indigenous non-Aryan healing practices had influenced the Vedic Aryan healers.

Q: What is the most important step in prioritizing goals? 3028 0

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    deciding what is most important
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    having multiple tasks lined up for each goal
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    determining categories for various goals
    Correct
    Wrong
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    writing a list of goals
    Correct
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Answer : 1. "deciding what is most important"
Explanation :

Answer: A) deciding what is most important Explanation: Always prioritize by what's most important to what is less important to us to reach our goals as soon as possible.

Q: Study of sound is called 3028 0

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    Agronomy
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    Accoustics
    Correct
    Wrong
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    Aesthetics
    Correct
    Wrong
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    Aeronautics
    Correct
    Wrong
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Answer : 2. "Accoustics"
Explanation :

Answer: B) Accoustics Explanation: Accoustics is a subject deals with the Study of sound   Aesthetics is a Philosophy of fine arts   The science or art of flight is called Aeronautics   The science of soil management is called Agronomy.

Q: Programs stored in ROM are called 3027 1

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    Hardware
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    Wrong
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    Firmware
    Correct
    Wrong
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    Freeware
    Correct
    Wrong
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    Software
    Correct
    Wrong
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Answer : 2. "Firmware"
Explanation :

Answer: B) Firmware Explanation: The programs which are as permanent as hardware and stored in ROM are known as Firmware.   Data stored in ROM can only be modified slowly, with difficulty, or not at all, so it is mainly used to store firmware (software that is closely tied to specific hardware, and unlikely to need frequent updates) or application software in plug-in cartridges.

Q: In a certain code, MONKEY is written as XDJMNL. How is TIGER written in that code ? 3016 0

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    SHFDQ
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    Wrong
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    HFDSQ
    Correct
    Wrong
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    RSAFD
    Correct
    Wrong
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    QDFHS
    Correct
    Wrong
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Answer : 4. "QDFHS"
Explanation :

Answer: D) QDFHS Explanation: The letter of the word are written in a reverse order and then each letter is moved one step backward to obtain the code.

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