RRB Group D 2025 Arithmetic Practice Questions

RRB Group D 2025 Arithmetic Practice Questions: Preparing for the RRB Group D 2025 CBT Exam? Arithmetic is a high-scoring section covering Percentages, Profit & Loss, Time & Work, Simple Interest, Averages, and more. Below are 20 carefully selected moderate-level arithmetic questions to boost your speed and accuracy.

RRB Group D 2025 Arithmetic Practice Questions

1. Percentages

1. If 20% of a number is 50, what is 40% of the same number?
   • (a) 80
   • (b) 100
   • (c) 120
   • (d) 150
2. A number increased by 25% becomes 150. What is the original number?
   • (a) 100
   • (b) 120
   • (c) 125
   • (d) 130

2. Profit & Loss

3. A shopkeeper buys a watch for ₹500 and sells it for ₹600. What is his profit percentage?
   • (a) 15%
   • (b) 20%
   • (c) 25%
   • (d) 30%
4. An item is sold at a 10% loss for ₹450. What was its cost price?
   • (a) ₹500
   • (b) ₹550
   • (c) ₹600
   • (d) ₹650

3. Time & Work

5. If 12 workers can complete a job in 8 days, how many workers are needed to finish it in 6 days?
   • (a) 14
   • (b) 16
   • (c) 18
   • (d) 20
6. A and B together can do a work in 10 days. If A alone takes 15 days, how long will B take alone?
   • (a) 20 days
   • (b) 25 days
   • (c) 30 days
   • (d) 35 days

4. Simple Interest (SI)

7. A sum of ₹2000 becomes ₹2400 in 4 years at simple interest. What is the rate of interest?
   • (a) 5%
   • (b) 6%
   • (c) 8%
   • (d) 10%
8. How much time will ₹5000 take to double at 10% simple interest?
   • (a) 5 years
   • (b) 8 years
   • (c) 10 years
   • (d) 12 years

5. Averages

9. The average of 5 numbers is 24. If one number is excluded, the average becomes 20. What is the excluded number?
   • (a) 30
   • (b) 35
   • (c) 40
   • (d) 45
10. The average age of 4 boys is 16 years. If a new boy joins, the average becomes 17 years. What is the new boy’s age?

• (a) 18
• (b) 20
• (c) 21
• (d) 22

6. Time, Speed & Distance

11. A train covers 300 km in 5 hours. What is its speed in m/s?

• (a) 15 m/s
• (b) 16.67 m/s
• (c) 18 m/s
• (d) 20 m/s

12. A man walks at 6 km/h and reaches his office in 20 minutes. If he cycles at 12 km/h, how long will he take?

• (a) 5 min
• (b) 8 min
• (c) 10 min
• (d) 12 min

7. Ratio & Proportion

13. If A:B = 3:4 and B:C = 5:6, what is A:C?

• (a) 5:8
• (b) 6:7
• (c) 7:8
• (d) 8:9

14. Divide ₹1200 between A and B in the ratio 3:5. How much does B get?

• (a) ₹450
• (b) ₹600
• (c) ₹750
• (d) ₹800

8. Number System

15. What is the HCF of 36 and 48?

• (a) 6
• (b) 12
• (c) 18
• (d) 24

16. Find the LCM of 15, 20, and 25.

• (a) 150
• (b) 200
• (c) 300
• (d) 350

9. Simplification

17. Solve: 125 ÷ 5 + 12 × 3 – 8

• (a) 45
• (b) 53
• (c) 60
• (d) 65

18. What is the value of 40% of 250 + 30% of 400?

• (a) 180
• (b) 200
• (c) 220
• (d) 240

10. Miscellaneous

19. A man buys 10 pens for ₹80 and sells 8 pens for ₹88. What is his profit per pen?

• (a) ₹2
• (b) ₹3
• (c) ₹4
• (d) ₹5

20. If 20% of (A + B) = 50% of B, what is A:B?

• (a) 1:2
• (b) 2:3
• (c) 3:2
• (d) 4:5

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Answer Key & Solutions

1. (b) 100 (If 20% = 50, then 40% = 100)
2. (b) 120 (Let original no. = x; x + 25% of x = 150 ⇒ x = 120)
3. (b) 20% (Profit = ₹100, % Profit = (100/500) × 100 = 20%)
4. (a) ₹500 (CP = SP / (1 – Loss%) = 450 / 0.9 = ₹500)
5. (b) 16 (M1D1 = M2D2 ⇒ 12×8 = M2×6 ⇒ M2 = 16)
6. (c) 30 days (B’s efficiency = (1/10 – 1/15) = 1/30 ⇒ 30 days)
7. (a) 5% (SI = ₹400, Rate = (400×100)/(2000×4) = 5%)
8. (c) 10 years (SI needed = ₹5000, Time = (5000×100)/(5000×10) = 10 yrs)
9. (c) 40 (Total of 5 nos. = 120, Total of 4 nos. = 80 ⇒ Excluded no. = 40)
10. (c) 21 (Total age of 4 boys = 64, New total = 85 ⇒ New boy’s age = 21)
11. (b) 16.67 m/s (Speed = 300/5 = 60 km/h = 60×5/18 ≈ 16.67 m/s)
12. (c) 10 min (Distance = 6×(20/60) = 2 km; Time = 2/12 hrs = 10 min)
13. (a) 5:8 (A:B = 3:4, B:C = 5:6 ⇒ A:B:C = 15:20:24 ⇒ A:C = 15:24 = 5:8)
14. (c) ₹750 (B’s share = (5/8) × 1200 = ₹750)
15. (b) 12 (HCF of 36 & 48 = 12)
16. (c) 300 (LCM of 15, 20, 25 = 300)
17. (b) 53 (125 ÷ 5 = 25; 12 × 3 = 36 ⇒ 25 + 36 – 8 = 53)
18. (c) 220 (40% of 250 = 100; 30% of 400 = 120 ⇒ Total = 220)
19. (b) ₹3 (CP per pen = ₹8, SP per pen = ₹11 ⇒ Profit = ₹3)
20. (c) 3:2 (0.2(A+B) = 0.5B ⇒ 0.2A = 0.3B ⇒ A/B = 3/2)

Also Read: RRB NTPC 2025 অনুপাত এবং সমানুপাত প্রশ্ন উত্তর সহ প্র্যাকটিস সেট

Tips for RRB Group D Arithmetic Preparation

 Master shortcuts for percentage and profit-loss calculations.
 Practice time management (aim for 1 minute per question).
 Revise formulas (SI, averages, ratios) daily.
 Take mock tests to improve speed.

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