SSC Quantitative Aptitude 1 — Questions and Answers
Question 1: A train travels 360 km in 4 hours. What is its speed in meters per second?
- 20 m/s
- 25 m/s (Correct answer)
- 30 m/s
- 15 m/s
Correct answer: 25 m/s
Speed = 360 km/4 h = 90 km/h = 90 × (1000/3600) = 25 m/s.
Question 2: What is 15% of 240?
- 32
- 36 (Correct answer)
- 40
- 44
Correct answer: 36
15% of 240 = (15/100) × 240 = 36.
Question 3: A shopkeeper marks his goods 20% above cost price and offers 10% discount. What is his profit percentage?
- 8% (Correct answer)
- 10%
- 12%
- 14%
Correct answer: 8%
If CP=100, MP=120, SP=120×0.9=108, so profit = 8%.
Question 4: Find the LCM of 12, 15, and 20.
- 30
- 60 (Correct answer)
- 120
- 180
Correct answer: 60
LCM(12,15,20): 12=2²×3, 15=3×5, 20=2²×5; LCM=2²×3×5=60.
Question 5: If the simple interest on Rs. 2000 at 5% per annum for 3 years is Rs. 300, what would be the compound interest?
- Rs. 315.25 (Correct answer)
- Rs. 310.25
- Rs. 305.00
- Rs. 320.25
Correct answer: Rs. 315.25
CI = 2000[(1+0.05)³ − 1] = 2000[1.157625−1] = 2000×0.157625 = Rs. 315.25.
Question 6: A can do a job in 10 days and B can do it in 15 days. In how many days can they finish it together?
- 5 days
- 6 days (Correct answer)
- 8 days
- 12 days
Correct answer: 6 days
Combined rate = 1/10 + 1/15 = 3/30 + 2/30 = 5/30 = 1/6, so together they finish in 6 days.
SSC Quantitative Aptitude 1
A train travels 360 km in 4 hours.
What is its speed in meters per second?