IIT JEE प्रश्न और उत्तर का अभ्यास करें
8प्र: Pradeep correctly remembers that his mother's is before twenty third February but after ninteenth February, whereas his brother correctly remembers that their mother's birthday is not on or after twentysecond February. On which day in February is definitely their mother's birthday ? 2117 05b5cc758e4d2b4197774fc0f
5b5cc758e4d2b4197774fc0f- 120 or 21true
- 220false
- 321false
- 4Nonefalse
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उत्तर : 1. "20 or 21"
व्याख्या :
Answer: A) 20 or 21 Explanation: According to Pradeep : 20,21 or 22...(1)According to his brother : not 22....(2)From (1)&(2), the birthday falls on February 20 or 21.
प्र: H.C.F of 4 x 27 x 3125, 8 x 9 x 25 x 7 and 16 x 81 x 5 x 11 x 49 is : 2116 05b5cc6e7e4d2b4197774eda6
5b5cc6e7e4d2b4197774eda6- 1360false
- 2180true
- 390false
- 4120false
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उत्तर : 2. "180"
व्याख्या :
Answer: B) 180 Explanation: 4 x 27 x 3125 = 22 × 33 × 55 ; 8 x 9 x 25 x 7 = 23 × 32 × 52 × 7 16 x 81 x 5 x 11 x 49 = 24 × 34 × 5 × 11 × 72 H.C.F = 22 × 32 × 5 = 180.
प्र: Which of the following represents a positive economic statement? 2116 05b5cc694e4d2b4197774c475
5b5cc694e4d2b4197774c475- 1The government should extend unemployment benefits.false
- 2The unemployment rate is too high.false
- 3Taxes should not be increased since that will lower spending.false
- 4The unemployment rate is 4.8 percent.true
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उत्तर : 4. "The unemployment rate is 4.8 percent."
व्याख्या :
Answer: D) The unemployment rate is 4.8 percent. Explanation:
प्र: Find the odd one out of the following number series? 56, 64, 48, 90, 16, 144 2116 05b5cc658e4d2b4197774bddd
5b5cc658e4d2b4197774bddd- 148false
- 264false
- 390true
- 416false
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उत्तर : 3. "90"
व्याख्या :
Answer: C) 90 Explanation: The given number series follows a pattern that, 56 56 + 8 = 64 64 - 16 = 48 48 + 32 = 80 (Not equal to 90) 80 - 64 = 16 16 + 128 = 144 Hence, the odd number in the given number series is 90.
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उत्तर :
व्याख्या :
Scores of individuals : Dhoni= 80,30,10,10,1Raina=100,25,3,2,1Kholi=85,20,15,10,1Shikhar=90,20,15,3,3 Above combination satisfies all conditions given in the question. Answer 1) Raina Answer 2) Kohli and Shikhar Answer 3) Dhoni
प्र: Which three components are common to all amino acids? 2115 05b5cc619e4d2b4197774b72e
5b5cc619e4d2b4197774b72e- उत्तर देखेंउत्तर छिपाएं
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उत्तर :
व्याख्या :
Any two amino acids vary structure by the r-group, otherwise all amino acids are in the same structure. All amino acids have in common carboxyl group -COO , amino group -NH3+ and a hydrogen -H and a r-group which are all bonded to a central carbon.
प्र: Gluconeogenesis is a term that describes the synthesis of 2112 05b5cc645e4d2b4197774bbef
5b5cc645e4d2b4197774bbef- उत्तर देखेंउत्तर छिपाएं
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उत्तर :
व्याख्या :
Gluconeogenesis is a metabolic pathway that leads to the synthesis of glucose from pyruvate and other non-carbohydrate precursors, even in non-photosynthetic organisms. It occurs in all microorganisms, fungi, plants and animals, and the reactions are essentially the same, leading to the synthesis of one glucose molecule from two pyruvate molecules. Therefore, it is in essence glycolysis in reverse, which instead goes from glucose to pyruvate, and shares seven enzymes with it.
प्र: Which country shares the longest border with China? 2112 05b5cc62ce4d2b4197774b917
5b5cc62ce4d2b4197774b917- 1Indiafalse
- 2Russiafalse
- 3Mongoliatrue
- 4Kazakhstanfalse
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उत्तर : 3. "Mongolia"
व्याख्या :
Answer: C) Mongolia Explanation: China shares land borders with 14 different countries, the longest being with Mongolia followed by Russia and then India.

