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नवीनतमलोकप्रियमूल्यांकनपेज देखें 17 of 261कुल सवाल 2086 जॉइन Examsbook

प्र: 2 is to 55 as 6 is to 5917 0

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    99
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  • 2
    44
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  • 3
    9
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  • 4
    33
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उत्तर : 1. "99"
व्याख्या :

Answer: A) 99 Explanation: Given 2 is to 55 2 + 3 = 5  5 x 11 = 55 Similarly, 6 6 + 3 = 9 9 x 11 = 99   Hence, 2 is to 55 as 6 is to 99.

प्र: There are seven persons P, Q, R, S, T, U and V up on a ladder(not in this order).P is further up than T but is lower than R. Q is in the middle. V is between P and Q. T is between Q and U. If U is between T and S, the person on the bottom step of the ladder will be ? 5916 0

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    S
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    R
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    U
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    T
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उत्तर : 1. "S"
व्याख्या :

Answer: A) S Explanation: Here as given Q is in the middle and it satisfies all other conditions given in the question.

प्र: A group of 10 representatives is to be selected out of 12 seniors and 10 juniors. In how many different ways can the group be selected if it should have at least one senior ? 5895 0

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    ²²C₁₀ + 1
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    ²²C₉ + ¹⁰C₁
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  • 3
    ²²C₁₀
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  • 4
    ²²C₁₀ - 1
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उत्तर : 4. "²²C₁₀ - 1"
व्याख्या :

Answer: D) ²²C₁₀ - 1 Explanation: The total number of ways of forming the group of ten representatives is ²²C₁₀. The total number of ways of forming the group that consists of no seniors is ¹⁰C₁₀ = 1 way The required number of ways = ²²C₁₀ - 1

प्र: Which is the gas used for making vegetables and vanaspathi from vegetable oils? 5886 0

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    Hydrogen
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    Nitrogen
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    Argon
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    Helium
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उत्तर : 1. "Hydrogen"
व्याख्या :

Answer: A) Hydrogen Explanation: Hydrogen gas is used for making vegetables and vanaspathi from vegetable oils. As it is colourless, odourless, tasteless, flammable gaseous substance, it is added to oils to make them more solid or spreadable. The use of hydrogenation helps to prolong the shelf life of the food and maintain flavour stability.

प्र: Lichens are the best indicator of 5870 1

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    Air pollution
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    Sound pollution
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    Noise pollution
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    Water pollution
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उत्तर : 1. "Air pollution"
व्याख्या :

Answer: A) Air pollution Explanation: 1. Lichens are plants that grow in exposed places such as rocks or tree bark.   2.  Lichens are widely used as environmental indicators or bio-indicators. They can be used as air pollution indicators, especially of the concentration of sulfur-di-oxide in the atmosphere.     3. They need to be very good at absorbing water and nutrients to grow there.

प्र: Which of these relationships is true of an uncharged atom? 5847 0

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    The atomic mass is equal to the atomic number.
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    The number of electrons is equal to the number of neutrons.
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    The number of protons is equal to the number of electrons.
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    The atomic mass is equal to the number of electrons.
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उत्तर : 3. "The number of protons is equal to the number of electrons."
व्याख्या :

Answer: C) The number of protons is equal to the number of electrons. Explanation: The number of protons is equal to the number of electrons. That is the number of positive charges is equal to the number of negative charges.

प्र: Two persons start running simultaneously around a circular track of length 300 m from the same point at speeds of 15 km/hr and 25 km/hr. When will they meet for the first time any where on the track if they are moving in opposite directions  ? 5846 0

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    27 sec
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    31 sec
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    23 sec
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  • 4
    29 sec
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उत्तर : 1. "27 sec"
व्याख्या :

Answer: A) 27 sec Explanation: Time taken to meet for the first time anywhere on the track = length of the track / relative speed = 300 / (15 + 25)5/18 = 300x 18 / 40 x 5 = 27 seconds.

प्र: 'P' walked 1 km towards south direction and turned  90oACW and walked 2 km. Then he turned his left and walked 1 km and then he turned his right and walked 2 km. After that he turned 90o ACW and walked 3 km. How far is he from the starting point ? 5837 0

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    5 km
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    4 km
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    2 km
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  • 4
    0 km
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उत्तर : 1. "5 km"
व्याख्या :

Answer: A) 5 km Explanation:

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