IIT JEE Practice Question and Answer

Q: What comes next in this sequence 196, 169, 144, 121, 100, 81, ? 2249 0

  • 1
    77
    Correct
    Wrong
  • 2
    74
    Correct
    Wrong
  • 3
    67
    Correct
    Wrong
  • 4
    64
    Correct
    Wrong
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Answer : 4. "64"
Explanation :

Answer: D) 64 Explanation: The given number series follows a pattern that 196, 169, 144, 121, 100, 81, ?     -27  -25   -23   -21  -19  -17   => 81 - 17 = 64 Therefore, the series is 196, 169, 144, 121, 100, 81, 64.

Q: Who began public health and sanitation systems? 2248 0

  • 1
    Mexicans
    Correct
    Wrong
  • 2
    Egyptians
    Correct
    Wrong
  • 3
    Romans
    Correct
    Wrong
  • 4
    Chinese
    Correct
    Wrong
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Answer : 3. "Romans"
Explanation :

Answer: C) Romans Explanation: Romans (753 BC - AD 410) began public health and sanitation systems.   Romans established the first public health and sanitation systems by building sewers and aqueducts. They also treated diseases with diet, exercise and meditation.

Q: K is 50% faster than L. If L starts at 9 A.M. and K starts at 10 A.M. L travels at a speed of 50 km/hr. If L and K are 300 kms apart, The time when they meet when they travel in opposite direction is ? 2247 0

  • 1
    12 pm
    Correct
    Wrong
  • 2
    1 pm
    Correct
    Wrong
  • 3
    11 am
    Correct
    Wrong
  • 4
    11:30 am
    Correct
    Wrong
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Answer : 1. "12 pm"
Explanation :

Answer: A) 12 pm Explanation: let 't' be the time after which they met since L starts. Given K is 50% faster than L 50 t + 1.5*50(t-1) = 300 50 t +75 t = 300 + 75 t = 375 / 125 = 3 hrs past the time that L starts So they meet at (9 + 3)hrs = 12:00 noon.

Q: Clarence Pine Top Smith played what style of piano? 2246 0

  • 1
    Mozart
    Correct
    Wrong
  • 2
    Boogie - Woogie
    Correct
    Wrong
  • 3
    Beethoven
    Correct
    Wrong
  • 4
    Liszt
    Correct
    Wrong
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Answer : 2. "Boogie - Woogie"
Explanation :

Answer: B) Boogie - Woogie Explanation: Pine Top Smith (1899-1929) Considered to be the originator of the Boogie -Woogie style of piano playing.

Q: If the numerator of a fraction is increased by 150% and the denominator of the fraction is increased by 350%, the resultant fraction is 25/51. What is the original fraction ? 2244 0

  • 1
    31/25
    Correct
    Wrong
  • 2
    15/17
    Correct
    Wrong
  • 3
    14/25
    Correct
    Wrong
  • 4
    11/16
    Correct
    Wrong
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Answer : 2. "15/17"
Explanation :

Answer: B) 15/17 Explanation: The original fraction is  2551 × 350+100150+100  = 15/17.

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Answer : 4. "Tanuja"
Explanation :

Answer: D) Tanuja Explanation: The four vocal musicians and one actress in the group are given. Two dancers are Shailaja and Tanuja. Two violinists are Girija and Vanaja. Since Jalaja and Shailaja cannot be violinists, so remaining two violinists are Tanuja and Pooja. Clearly, Tanuja is both a violinist and a dancer.

Q: A motorboat can go 10 miles downstream on a river in 20 min. It takes 30 min for this boat to go back at the same 10 miles. Find the speed of the current ? 2243 0

  • 1
    8 m/h
    Correct
    Wrong
  • 2
    5 m/h
    Correct
    Wrong
  • 3
    7 m/h
    Correct
    Wrong
  • 4
    6 m/h
    Correct
    Wrong
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Answer : 2. "5 m/h"
Explanation :

Answer: B) 5 m/h Explanation: As the distance travelled is constant, the time taken is inversely proportional to speed. Let 'u' be the speed of the current and 'v' be the speed of the boat. Speed of the boat downstream = v + u & upstream = v - u => v+u/v-u = 30/20 => v/u = 5 => v = 5u => v + u = 6u = 10/20/60 miles/hr => 6u = 30 m/h => u = 5 m/h

Q: The sum of three consecutive multiples of 3 is 72. What is the second largest number ? 2241 0

  • 1
    27
    Correct
    Wrong
  • 2
    24
    Correct
    Wrong
  • 3
    21
    Correct
    Wrong
  • 4
    42
    Correct
    Wrong
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Answer : 2. "24"
Explanation :

Answer: B) 24 Explanation: Let the numbers be 3x, 3x + 3 and 3x + 6.Then,3x + (3x + 3) + (3x + 6) = 729x = 63x = 7Largest number = 3x + 6 = 27. => Second largest number = 27 - 3 = 24

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