CAT प्रश्न और उत्तर का अभ्यास करें
8प्र: 125% as a Fraction? 1690 05b5cc6aae4d2b4197774cf7f
5b5cc6aae4d2b4197774cf7f- 11/4false
- 23/4false
- 35/4true
- 47/4false
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उत्तर : 3. "5/4"
व्याख्या :
Answer: C) 5/4 Explanation: Literally any percentage means divide by 100. So 125% = 125100. That can be reduced to 5/4. To convert to a decimal, you can do long division, dividing 5 into 4.
प्र: The length of a rope in meter by which a cow must be tethered in order that she may be able to graze an area of 2826 sq.m is ? 1690 05b5cc731e4d2b4197774f823
5b5cc731e4d2b4197774f823- 115 mtsfalse
- 230 mtstrue
- 324 mtsfalse
- 436 mtsfalse
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उत्तर : 2. "30 mts"
व्याख्या :
Answer: B) 30 mts Explanation: The cow can graze an area of 2826 sq.m i.e it is able to cover area of circle of 2826 sq.m Therefore, πr2 =2826r2 =(2826×7/22) = 899.18 = 900r = 30 m. Therefore, the radius of the circle implies the length of the rope = 30 mts.
प्र: What is the difference between the number of uneducated females in city P and that of uneducated males in city S ? 1690 05b5cc6c8e4d2b4197774df37
5b5cc6c8e4d2b4197774df37- 19 lakhstrue
- 26 lakhsfalse
- 33 lakhsfalse
- 42 lakhsfalse
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उत्तर : 1. "9 lakhs"
व्याख्या :
Answer: A) 9 lakhs Explanation: Educated females in city P = 25 lakhs Uneducated females in city P = 30 - 25 = 5 lakhs Educated males city S = 21 lakhs Educated males in city S = 35 - 21= 14 lakhs Required difference = 14 - 5 = 9 lakhs
प्र: Order of basicity of amines in gaseous state? 1689 05b5cc67ee4d2b4197774c274
5b5cc67ee4d2b4197774c274- 12'> 1'> 3' > NH3false
- 23' > 2' > 1'> NH3true
- 31' > 2' > 3'> NH3false
- 42'> 3'> 1' > NH3false
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उत्तर : 2. "3' > 2' > 1'> NH3"
व्याख्या :
Answer: B) 3' > 2' > 1'> NH3 Explanation: The order of basicity in ammonia is different in gaseous phases vs. aqueous phases due to hydrogen bonding. So in gaseous phases it's the well known: 3' > 2' > 1'> NH3. Just so we're on the same page, this is due to the inductive effect of electron donating alkyl groups--they destabilize the lone pair on nitrogen atom, making nitrogen more basic. But in aqueous phase, the order is slightly different: 2'> 1'> 3' > NH3.
प्र: What gas makes up most of the atmosphere? 1689 05b5cc636e4d2b4197774ba48
5b5cc636e4d2b4197774ba48- 1Oxygenfalse
- 2Heliumfalse
- 3Nitrogentrue
- 4Carbondioxidefalse
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उत्तर : 3. "Nitrogen"
व्याख्या :
Answer: C) Nitrogen Explanation: Our atmosphere is made up of 78% Nitrogen, 21% Oxygen and 1% all other gases like argon, carbon dioxide, neon, and helium. So, Nitrogen makes up the majority of our atmosphere.
प्र: On the occasion of New Year, each student of a class sends greeting cards to the others. If there are 21 students in the class, what is the total number of greeting cards exchanged by the students? 1689 05b5cc6b9e4d2b4197774d757
5b5cc6b9e4d2b4197774d757- 1380false
- 2420true
- 3441false
- 4400false
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उत्तर : 2. "420"
व्याख्या :
Answer: B) 420 Explanation: Given total number of students in the class = 21 So each student will have 20 greeting cards to be send or receive (21 - 1(himself)) Therefore, the total number of greeting cards exchanged by the students = 20 x 21 = 420.
प्र: In a certain office, 1/3 of workers are women, 1/2 of the women are married and 1/3 of the married women have children. If 3/4 of the men are married and 2/3 of the married men have children, what part of the workers are without children? 1689 05b5cc79ae4d2b419777504df
5b5cc79ae4d2b419777504df- 15/18false
- 24/9false
- 311/18true
- 417/36false
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उत्तर : 3. "11/18"
व्याख्या :
Answer: C) 11/18 Explanation: Let the total number of workers be x. Then, Number of women = x/3 and number of men = x - x/3 = 2x/3 Number of women having children = x/18 Number of men having children = x/3 Number of workers having children = (x/18) + (x/3) = 7x/18 Therefore, workers having no children = x - 7x/18 = 11/18 of all workers.
प्र: 311, 230, 294, ?, 281, 256 What will come in place of the question mark (?) in the above number series? 1687 05b5cc6bbe4d2b4197774d81b
5b5cc6bbe4d2b4197774d81b- 1240false
- 2245true
- 3244false
- 4246false
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उत्तर : 2. "245"
व्याख्या :
Answer: B) 245 Explanation: Given 311 230 294 ? 281 256 311 - (9x9) = 230 230 + (8x8) = 294 294 - (7x7) = 245 245 + (6x6) = 281 281 - (5x5) = 256 Hence, the missing number in the given series is 245.

