RRB NTPC के लिए क्वांट क्विज 8 फरवरी 2020 : LCM & HCF

Q1. (6x³ + 60x² + 150x) और 3x⁴ + 12x³ – 15x²) का LCM क्या है?

Q2. यदि (x² + x – 12) और (2x² – kx – 9) का HCF (x – k) है, तो k का मान है:
(a) –3
(b) 3
(c) –4
(d) 4

Q3. यदि (3x³ – 2x²y – 13xy² + 10y³) को (x – 2y) से विभाजित किया जाता है, तो शेषफल कितना है?
(a) 0
(b) y + 5
(c) y + 1
(d) y² + 3

Q4. दो संख्याएं इस प्रकार हैं कि पहली संख्या का दोगुना और दूसरी संख्या के तीन गुना का योग 36 है और पहली संख्या का तीन गुना और दूसरी संख्या के दो गुना का योग 39 है। छोटी संख्या कौन सी है?
(a) 9
(b) 5
(c) 7
(d) इनमें से कोई नहीं

Q5. यदि दो संख्याओं का योग और अंतर क्रमशः 20 और 8 है, तो उनके वर्ग का अंतर है:
(a) 12
(b) 28
(c) 80
(d) 160

Q6. 2-अंकीय संख्याओं की पुनरावृत्ति द्वारा 4-अंकीय संख्या निर्मित की जाती है कि जैसे 2525, 3232 आदि। इस तरह से निर्मित कोई भी संख्या हमेशा किससे विभाज्य होगी?
(a) 7
(b) 11
(c) 13
(d) सबसे छोटी 3 अंकों वाली आभाज्य संख्या

Q7. एक संख्या को 68 द्वारा विभाजित करने पर भागफल 269 और शेषफल शून्य प्राप्त होता है। यदि समान संख्या को 67 से विभाजित किया जाता है, तो शेषफल है:
(a) 0
(b) 1
(c) 2
(d) 3

Q8. निम्नलिखित संख्याओं का बहुलक क्या है?
1, 2, 4, 6, 4, 3, 5, 4
(a) 1
(b) 2
(c) 3
(d) 4

Q9. निम्नलिखित डाटा की माध्यिका ज्ञात कीजिए।
27, 39, 49, 20, 21, 28, 38
(a) 49
(b) 21
(c) 28
(d) 38

Q10. 5% की वार्षिक विकास दर पर एक शहर की जनसंख्या में वृद्धि होती है। यदि वर्तमान जनसंख्या 1,60,000 है, तो 4 वर्ष बाद जनसंख्या कितनी होगी?
(a) 1,94,481
(b) 1,78,641
(c) 1,92,000
(d) 1,65,000

Solutions:

S6. Ans.(d)
Sol. By 101 which is the smallest 3-digit prime number.

S7. Ans.(b)
Sol. The number is 68 × 269 = 18292. 18292, when divided by 67, leaves a remainder of 1.

S8. Ans.(d)
Sol. The mode is the value which appears the most often in the data. It is possible to have more than one mode if there is more than one value which appears the most.

S9. Ans.(c)
Sol. To find the median, you need to put the values in order, then find the middle value. If there are two values in the middle, then you find the mean of these two values.
Series = 20, 21, 27, 28, 38, 39, 49
Median = 28

Important Links for RRB NTPC Recruitment 2019
RRB NTPC Admit Card
RRB NTPC Previous year Cut Off | 1st & 2nd Stage Examination
RRB NTPC Recruitment 2019: Check FAQs
RRB NTPC Exam Pattern 2019 – Check Here
RRB NTPC Previous Year Exam Analysis
RRB NTPC Exam Syllabus

 

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