IIT JEE प्रश्न और उत्तर का अभ्यास करें
8प्र: One year ago the ratio between Maneela’s and Shanthi’s salary was 3 : 4. The ratios of their individual salaries between last year’s and this year’s salaries are 4 : 5 and 2 : 3 respectively. At present the total of their salary is Rs. 4160. The salary of Maneela, now is? 6183 05b5cc678e4d2b4197774c165
5b5cc678e4d2b4197774c165- 1Rs. 1600true
- 2Rs. 1700false
- 3Rs. 1800false
- 4Rs. 1900false
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उत्तर : 1. "Rs. 1600"
व्याख्या :
Answer: A) Rs. 1600 Explanation: Let the salaries of Maneela and Shanthi one year before be M1, S1 & now be M2, S2 respectively. Then, from the given data, M1/S1 = 3/4 .....(1) M1/M2 = 4/5 .....(2) S1/S2 = 2/3 .....(3) and M2 + S2 = 4160 .....(4) Solving all these eqtns, we get M2 = Rs. 1600.
प्र: Find the odd number out of the following number series? 2 4 8 11.5 18.25 28.375 6180 05b5cc68be4d2b4197774c380
5b5cc68be4d2b4197774c380- 118.25false
- 228.375false
- 311.5false
- 48true
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उत्तर : 4. "8"
व्याख्या :
Answer: D) 8 Explanation: Given number series follows a pattern that, 2 2 x 1.5 + 1 = 4 4 x 1.5 + 1 = 7 (not equal to 8) 7 x 1.5 + 1 = 11.5 11.5 x 1.5 + 1 = 18.25 18.25 x 1.5 + 1 = 28.375 Hence, the odd number in the given number series is 8.
प्र: The process of collecting, organizing and analyzing data is called 6160 05b5cc694e4d2b4197774c47f
5b5cc694e4d2b4197774c47f- 1Statisticstrue
- 2Data collectionfalse
- 3Probabilityfalse
- 4Systematic evaluationfalse
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उत्तर : 1. "Statistics"
व्याख्या :
Answer: A) Statistics Explanation: The process of collecting, organizing and analyzing data is called Statistics.
प्र: Off-duty risk decisions are 6158 05b5cc688e4d2b4197774c322
5b5cc688e4d2b4197774c322- 1Dictated by the Department of the Armyfalse
- 2The responsibility of individual Soldierstrue
- 3Made by leaders and commandersfalse
- 4Not a considerationfalse
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उत्तर : 2. "The responsibility of individual Soldiers"
व्याख्या :
Answer: B) The responsibility of individual Soldiers Explanation: Risk Management : A decision-making process for identifying hazards and controlling risks both on-duty and off-duty is called a Risk Management (RM). Hence, Off-duty risk decisions are the responsibility of individual Soldiers.
प्र: Three persons A, B and C are standing in a queue. There are five persons between A and B and eight persons between B and C. If there be three persons ahead of C and 21 persons behind A, what could be the minimum number of persons in the queue? 6082 05b5cc7f2e4d2b41977751eac
5b5cc7f2e4d2b41977751eac- 141false
- 240false
- 328true
- 427false
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उत्तर : 3. "28"
व्याख्या :
Answer: C) 28 Explanation: Three persons A, B, C can be arranged in a queue in six different ways, ie ABC, CBA, BAC, CAB, BCA, ACB. But since there are only 3 persons ahead of C, so C should be in front of the queue. Thus, there are only two possible arrangements, ie CBA and CAB. We may consider the two cases as under: Case I: ←3C↔8B↔5A→21 Clearly, number of persons in the queue = (3+1+8+1+5+1+21=) 40 Case II: ←3C A↔5B Number of persons between A and C = (8 - 6) = 2 ∵[C↔8B A→21B] Clearly number of persons in the queue = (3+1+2+1+21) = 28 Now, 28 < 40. So, 28 is the minimum number of persons in the queue.
प्र: Boy, man, uncle, fireman, grandfather are... 6079 05b5cc6dee4d2b4197774ea51
5b5cc6dee4d2b4197774ea51- 1Feminine titlesfalse
- 2Masculine titlestrue
- 3Both Feminine and Masculine titlesfalse
- 4None of the abovefalse
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उत्तर : 2. "Masculine titles"
व्याख्या :
Answer: B) Masculine titles Explanation: As they are the titles of male gender, they are called as Masculine titles.
प्र: What is the number of digits in 333? Given that log3 = 0.47712? 6073 05b5cc7d0e4d2b41977751209
5b5cc7d0e4d2b41977751209- 112false
- 213true
- 314false
- 415false
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उत्तर : 2. "13"
व्याख्या :
Answer: B) 13 Explanation: Let Let x=333 = 333 Then, logx = 33 log3 = 27 x 0.47712 = 12.88224 Since the characteristic in the resultant value of log x is 12 ∴The number of digits in x is (12 + 1) = 13 Hence the required number of digits in 333is 13.
प्र: Amar can do a piece of work in 10 days. He works at it for 4 days and then Arun finishes it in 9 days. In how many days can Amar and Arun together finish the work ? 6072 05b5cc6d6e4d2b4197774e66a
5b5cc6d6e4d2b4197774e66a- 14 daysfalse
- 28 daysfalse
- 33 daysfalse
- 46 daystrue
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उत्तर : 4. "6 days"
व्याख्या :
Answer: D) 6 days Explanation: 4/10 + 9/x = 1 => x = 15 Then both can do in 1/10 + 1/15 = 1/6 => 6 days

