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RRB NTPC Mathematics Questions: 3rd August

Dear aspirants,

As you all know, RRB NTPC Exam will be held in the month of August-September 2019. So we are here to help you with the Mathematics subject. We are providing daily quantitative aptitude quizzes, which will help you to score good marks in this section. We aim to provide the best study material to our readers with exam level questions to help them get used to the recent pattern. Attempt this quiz and check your preparation.

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Q2. A piece of work was finished by A, B and C together. A and B together finished 60% of the work and B and C together finished 70% of the work. Who among the three is most efficient?
A, B और C द्वारा मिल कर एक कार्य किया जाता है. A और B मिल कर 60% कार्य पूरा करते है और B और C दोनों 70% कार्य पूरा करते है. तीनों में से सबसे कुशल कौन है?
(a) A
(b) B
(c) C
(d) A or B/ A या B

S2. Ans.(c)
Sol.

Q3. Three solid spheres of radius 3 cm, 4 cm and 5 cm are melted and recasted into a solid sphere. What will be the percentage decrease in the surface area?
तीन ठोस गोलाकार जिनकी त्रिज्या 3 सेमी, 4 सेमी और 5 सेमी है पिघाले जाते हैं और एक ठोस क्षेत्र में पुन: बनाये जाते हैं. सतह क्षेत्र में कितने प्रतिशत कमी होगी?
(a) 12
(b) 14
(c) 16
(d) 18

Q4. The marked price of a sofa set is Rs 4800 which is sold at Rs 3672 at two successive discounts. If the first discount is 10%, then what will be the second discount (in %)?
सोफे सेट का चिह्नित मूल्य 4800 रुपये है जो दो लगातार छूट पर 3672 रुपये पर बेचा जाता है. यदि पहली छूट 10% है, तो दूसरी छूट (% में) क्या होगी?
(a) 13
(b) 14
(c) 15
(d) 17

Q5. A, B and C invested amounts in the ratio 3 : 4 : 5 respectively. If the schemes offered compound interest at the rate of 20% per annum, 15% per annum and 10% per annum respectively, then what will be the ratio of their amounts after 1 year?
A, B और C क्रमशः 3: 4: 5 की अनुपात में राशि निवेश करते है. यदि योजनाओं के तहत क्रमशः 20% प्रतिवर्ष ,15% प्रति वर्ष और 10% प्रति वर्ष की दर से चक्रवृद्धि ब्याज प्रदान किया जाता है, तो 1 साल के बाद उनकी राशि का अनुपात क्या होगा?
(a) 3 : 15 : 25
(b) 6 : 6 : 5
(c) 36 : 46 : 55
(d) 12 : 23 : 11

Q6. The average age of 120 members of a society is 60.7 years. By addition of 30 new members, the average age becomes 56.3 years. What is the average age (in years) of newly joined members?
समाज के 120 सदस्यों की औसत आयु 60.7 वर्ष है. 30 नए सदस्यों के आने से, औसत आयु 56.3 वर्ष हो जाती है. नए जुड़ने वाले सदस्यों की औसत आयु (वर्षों में) क्या है?
(a) 36.5
(b) 37.2
(c) 38.3
(d) 38.7

Q7. By selling 175 pineapples, the gain is equal to the selling price of 50 pineapples. What is the gain percentage?
175 अनानास बेचकर, लाभ 50 अनानास की बिक्री मूल्य के बराबर है. लाभ प्रतिशत क्या है?
(a) 28
(b) 30
(c) 32
(d) 40

Q8. If A has got 20% more marks than B, then by what percent marks of B are less than the marks of A?
यदि A को B से 20% अधिक अंक प्राप्त होते है, तो B के अंक A के अंक से कितने प्रतिशत कम है?
(a) 16.66
(b) 20
(c) 33.33
(d) 14.28

Q9. A train leaves Delhi at 10 a.m. and reaches Jaipur at 4 p.m. on same day. Another train leaves Jaipur at 12 p.m. and reaches Delhi at 5 p.m. on same day. What is the time of day (approximately) when the two trains will meet?
एक ट्रेन सुबह 10 बजे दिल्ली से निकलती है और उसी दिन शाम 4 बजे जयपुर पहुँच जाती है. दूसरी ट्रेन दोपहर 12 बजे जयपुर से निकलती है और उसी दिन शाम 5 बजे दिल्ली पहुँच जाती है. दिन के किस समय (लगभग) दोनों ट्रेने मिलेंगी ?
(a) 1:42 p.m.
(b) 1:27 p.m.
(c) 2:04 p.m.
(d) 1:49 p.m.

Q10. The difference between the compound interest compounding half yearly for 1 year and the simple interest for 1 year on a certain sum of money lent out at 8% per annum is Rs 64. What is the sum (in Rs)?
एक निश्चित राशि पर 8% प्रति वर्ष की ब्याज दर पर एक वर्ष में प्राप्त अर्ध वार्षिक संयोजित चक्रवृद्धि ब्याज और एक वर्ष के लिए सामान्य ब्याज के मध्य का अंतर 64 रूपए है. योग (रुपये में) क्या है?
(a) 40000
(b) 42000
(c) 44000
(d) 44800

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