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RRB NTPC Maths - Set 10 (Previous Year Based Questions)

 

RRB NTPC Maths - Set 10 (Previous Year Based Questions)

Q1. एक वस्तु का मूल्य ₹2400 है। यदि इसे 20% की हानि पर बेचा जाए, तो विक्रय मूल्य क्या होगा?
A. ₹1920
B. ₹2000
C. ₹2200
D. ₹1800
🟩 Answer: A. ₹1920
📘 Explanation: SP = 2400 × (1 - 20/100) = 2400 × 0.8 = ₹1920


Q2. किसी संख्या का 40% = 96 है। संख्या क्या है?
A. 240
B. 220
C. 250
D. 260
🟩 Answer: A. 240
📘 Explanation: Let number be x → 40% of x = 96 → (40/100)x = 96 → x = 240


Q3. यदि A : B = 3 : 4 और B : C = 5 : 6 हो, तो A : C का अनुपात क्या होगा?
A. 5 : 8
B. 3 : 5
C. 15 : 24
D. 18 : 20
🟩 Answer: C. 15 : 24
📘 Explanation: Multiply the ratios → A : B : C = 15 : 20 : 24 → A : C = 15 : 24


Q4. किसी आयत की लम्बाई 25 मीटर और चौड़ाई 15 मीटर है। क्षेत्रफल क्या होगा?
A. 375 m²
B. 350 m²
C. 400 m²
D. 390 m²
🟩 Answer: A. 375 m²
📘 Explanation: Area = Length × Breadth = 25 × 15 = 375 m²


Q5. 2 साल के लिए 5% वार्षिक साधारण ब्याज पर ₹8000 पर कितना ब्याज मिलेगा?
A. ₹800
B. ₹700
C. ₹600
D. ₹1000
🟩 Answer: A. ₹800
📘 Explanation: SI = (P×R×T)/100 = (8000×5×2)/100 = ₹800


Q6. किसी संख्या का 3/4 भाग 180 है, तो पूर्ण संख्या क्या है?
A. 240
B. 260
C. 300
D. 320
🟩 Answer: C. 240
📘 Explanation: Let x, then (3/4)x = 180 → x = (180×4)/3 = 240


Q7. एक ट्रैन 72 किमी/घंटा की गति से 500 मीटर लंबा पुल पार करने में कितना समय लेगी?
A. 25 सेकंड
B. 20 सेकंड
C. 30 सेकंड
D. 35 सेकंड
🟩 Answer: C. 25 सेकंड
📘 Explanation: Time = Distance / Speed = 500/(72×5/18) = 25 sec


Q8. यदि कोई वस्तु ₹1500 में खरीदी गई और उसे 10% लाभ पर बेचा गया, तो विक्रय मूल्य क्या होगा?
A. ₹1600
B. ₹1650
C. ₹1700
D. ₹1800
🟩 Answer: B. ₹1650
📘 Explanation: SP = 1500 + 10% of 1500 = 1500 + 150 = ₹1650


Q9. दो संख्याओं का औसत 25 है। यदि एक संख्या 30 हो तो दूसरी क्या होगी?
A. 20
B. 22
C. 19
D. 21
🟩 Answer: A. 20
📘 Explanation: (30 + x)/2 = 25 → 30 + x = 50 → x = 20


Q10. किसी वस्तु का मूल्य 25% बढ़ा दिया गया है। यदि नया मूल्य ₹250 है, तो मूल मूल्य क्या था?
A. ₹200
B. ₹220
C. ₹240
D. ₹230
🟩 Answer: A. ₹200
📘 Explanation: Let original price = x → x + 25%x = 250 → 1.25x = 250 → x = ₹200

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