IIT JEE प्रश्न और उत्तर का अभ्यास करें

प्र: The difference between simple interest and compound interest of a certain sum of money at 20% per annum for 2 years is Rs. 56. Then the sum is : 1669 0

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    Rs. 3680
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    Rs. 2650
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    Rs. 1400
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    Rs. 1170
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    गलत
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उत्तर : 3. "Rs. 1400"
व्याख्या :

Answer: C) Rs. 1400 Explanation: We know thatThe Difference between Compound Interest and Simple Interest for n years at R rate of interest is given by C.In - S.In = PR100n Here n = 2 years, R = 20%, C.I - S.I = 56 56 = P201002=> P = 56 x 52=> P = 56 x 25=> P = Rs. 1400

प्र: 74.99% of 1299 + 8.98% of 1899 = ? 1669 0

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    1378
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    1301
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    1212
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    1197
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उत्तर : 3. "1212"
व्याख्या :

Answer: C) 1212 Explanation: 74.99% of 1299 + 8.98% of 1899 = ?  ? = 75 x 1400100 + 9 x 1800100 ? = 1050 + 162? = 1212.

प्र: Four person A, B, C and D. The sum of their present age is 176. Four years ago ratio of their age was 11: 9 : 6 : 14, then find who is eldest and youngest among them ? 1669 0

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    A is eldest & C is youngest
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    D is eldest & C is youngest
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    C is eldest & A is youngest
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    A is eldest & B is youngest
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उत्तर : 2. "D is eldest & C is youngest"
व्याख्या :

Answer: B) D is eldest & C is youngest Explanation: Given sum of present ages of A, B, C & D A + B + C + D = 176 and also given that, (A-4) : (B-4) : (C-4) : (D-4) = 11 : 9 : 6 : 14 Let the ratio = x => A-4 + B-4 + C-4 + D-4 = 11x + 9x + 6x + 14x => (A + B + C + D ) - 16 = 40x => 176 - 16 = 40x => x = 4 => A = 44 + 4 = 48 => B = 40 => C = 28 => D = 60 Therefore, from the above conclusions D is eldest with 60 years and C is youngest with 28 years of ages.

प्र: Nepal Government announces public holidays during Nepalese President's visit to _____ 1668 0

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    India
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    China
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    Japan
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    Russia
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उत्तर : 1. "India"
व्याख्या :

Answer: A) India Explanation: Nepalese President Bidya Devi Bhandari is arriving in New Delhi on a five-day visit to India. This will be Bhandari's first foreign trip after assuming the office in October 2015, following the promulgation of the new Constitution in Nepal.

प्र: A Bus is running at 9/10 of its own speed reached a place in 22 hours. How much time could be saved if the bus would run at its own speed ? 1668 0

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    1.5 hrs
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    1.7 hrs
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    2.2 hrs
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  • 4
    3.5 hrs
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उत्तर : 3. "2.2 hrs"
व्याख्या :

Answer: C) 2.2 hrs Explanation: Let the original Speed be "s" kmphAnd the usual time be "t" hrsGiven that if the bus is running at 9s/10 kmph the time is 22 hrs=> [9s/10] x 22 = t x s=> 99/5 = t => t = 19.8 hrs   Hence, if bus runs at its own speed, the time saved = 22 - 19.8 = 2.2 hrs.

प्र: Which of the following is true about blood plasma? 1667 0

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    The main protein component is hemoglobin.
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    It is a faint yellow fluid.
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    It is the same as serum but without the clotting proteins.
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    It is about 90% water.
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उत्तर : 4. "It is about 90% water."
व्याख्या :

Answer: D) It is about 90% water. Explanation: The first option is incorrect because it is devoid of blood cell, also red blood cells so doesn’t contains haemoglobin. The second option is incorrect because plasma is colorless. The third option is also incorrect because plasma contains the clotting factors.

प्र: Guess the Hiding Letter  ? 1667 0

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    D
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    K
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    L
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    G
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उत्तर : 4. "G"
व्याख्या :

Answer: D) G Explanation: Starting from letter 'S' add 5 in the clock wise direction to get the next letter in English alphabets. Here S + 5 => 19 + 5 = 24 => X X + 5 = 24 + 5 = 3 => C Similarly,  B + 5 = G

प्र: A hybrid of a donkey and a horse 1667 0

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    Panthera and Mule
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    Mules and Hinnys
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    Liger and Hinnys
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    Wholphin and Mule
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उत्तर : 2. "Mules and Hinnys"
व्याख्या :

Answer: B) Mules and Hinnys Explanation: Donkeys and horses can be breed to make mules and hinnys. A hinny is a domestic equine hybrid that is the offspring of a male horse, a stallion, and a female donkey, a jenny. It is the reciprocal cross to the more common mule, which is the product of a male donkey, a jack, and a female horse, a mare.

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