IIT JEE प्रश्न और उत्तर का अभ्यास करें

प्र: A batsman scores 26 runs and increases his average from 14 to 15. Find the runs to be made if he wants top increasing the average to 19 in the same match ? 3511 0

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    74
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    79
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  • 3
    72
    सही
    गलत
  • 4
    60
    सही
    गलत
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उत्तर : 1. "74"
व्याख्या :

Answer: A) 74 Explanation: Number of runs scored more to increse the ratio by 1 is 26 - 14 = 12To raise the average by one (from 14 to 15), he scored 12 more than the existing average.Therefore, to raise the average by five (from 14 to 19), he should score 12 x 5 = 60 more than the existing average. Thus he should score 14 + 60 = 74.

प्र: Genetic alteration probably refers to altering what 3509 0

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    Genes found on ribosomes
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  • 2
    Genes found on chromosomes
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  • 3
    Genes found on cytoplasm
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    All of the above
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उत्तर : 2. "Genes found on chromosomes"
व्याख्या :

Answer: B) Genes found on chromosomes Explanation: Genetic alteration probably refers to altering Genes found on chromosomes.   Genetic alteration refers to altering DNA sequence. Gene alteration forms genetically modified products that modifies the gene sequence.   Genetic engineering, also called genetic modification or genetic manipulation, is the direct manipulation of an organism's genes using biotechnology.

प्र: A train moving at 2/3 rd of its normal speed reaches its destination 20 minutes late. Find the normal time taken ? 3508 0

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    4/3 hrs
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  • 2
    2/3 hrs
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  • 3
    3/2 hrs
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    गलत
  • 4
    1/4 hrs
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उत्तर : 2. "2/3 hrs"
व्याख्या :

Answer: B) 2/3 hrs Explanation: Let the original speed and time is S and Tthen distance = S x TNow the speed changes to 2/3S and T is T+20As the distance is sameS x T = 2/3Sx(T+20)solving this we get t = 40 minutes =40/60 = 2/3 hour

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उत्तर : 4. "A"
व्याख्या :

Answer: D) A Explanation: For the input "A rolling stone gathers no moss", the steps followed are: Step 1: rolling A stone gathers no moss Step 2: rolling stone A gathers no moss Step 3: rolling stone gathers A no moss Step 4: rolling stone gathers no A moss   After 4 steps the fifth word is "A".

प्र: Which veda deals with medicine? 3500 0

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    Atharva Veda
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    Yajur Veda
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    Sama Veda
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  • 4
    Rig Veda
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उत्तर : 1. "Atharva Veda"
व्याख्या :

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.

प्र: C U B A E D E D A B E B A U C D B C A D B D U B C A C B E D A    If all the A's are dropped from the above arrangement, which of the following will be eleventh from the left end of the above arrangement? 3499 0

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    E
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  • 2
    C
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  • 3
    D
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    U
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उत्तर : 4. "U"
व्याख्या :

Answer: D) U Explanation: If all the A's are dropped from the above arrangement, we get   C U B E D E D B E B U C D B C D B D U B C C B E D.    Here the eleventh from the left end of the above arrangement is U

प्र: The ages of Anushka, Kajal and Charu latha together are 57 years. Bharti is thrice as old as Anushka and Charu latha is 12 years older than Anushka. Then, the respective age of Anushka, Kajal and Charu latha is ? 3495 0

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    27, 9, 21
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    9, 21, 27
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    21, 27, 9
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  • 4
    9, 27, 21
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उत्तर : 4. "9, 27, 21"
व्याख्या :

Answer: D) 9, 27, 21 Explanation: Let Anushka age = XCharu latha 12 yrs older than Anushka so Charu latha age = x+12Kajal is thrice as old as Anushka so Kajal age = 3xThe ages of Anushka, Kajal and Charu latha together are 57 yearsi.e x + (x+12) + 3x = 57=> 5x = 45:- x = 9Anushka age = 9Kajal age = 3x = 27Charu latha age = x+12 = 21

प्र: What will come in place of question mark(?) in the following number series ? 6859       5832     ?      4096     3375 3494 0

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    4589
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    4913
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    5013
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    5169
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उत्तर : 2. "4913"
व्याख्या :

Answer: B) 4913 Explanation: The given series follows a pattern that, 19 x 19 x 19 = 6859 18 x 18 x 18 = 5832 17 x 17 x 17 = 4913 16 x 16 x 16 = 4096 15 x 15 x 15 = 3375 So, the missing number in the given series = 4913

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