RRB (NTPC) Practice Question and Answer
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Q: In a triangle ABC, DE ‖ BC, AD=2.5 cm, DB=5cm, AE=2 cm and BC=9cm. Find the EC and DE, respectively. 1565 05d1ef5cff5eae22172e6f4a7
5d1ef5cff5eae22172e6f4a7- 14cm and 3 cmtrue
- 25 cm and 3cmfalse
- 32cm and 4 cmfalse
- 44 cm and 5 cmfalse
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Answer : 1. "4cm and 3 cm"
Q: If \(x-{1\over x}\)=5, then the value of \(x ^4\)+ \({1\over x^4}\) . 1511 05d1ef42df5eae22172e6f499
5d1ef42df5eae22172e6f499- 1727true
- 2772false
- 3722false
- 4277false
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Answer : 1. "727"
Q: If x+y+z=6 and \(x^2\)+ \(y^2\) +\(z^2\)=20, then the value of \(x^3\)+\(y^3\)+\(z^3\)-3xyz is 1374 05d1eecc4f5eae22172e6f3c4
5d1eecc4f5eae22172e6f3c4- 164false
- 270false
- 372true
- 476false
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Answer : 3. "72"
Q: Jacob bought a scooter for a certain sum of money. He spent 10% of the cost on repairs and sold the scooter for a profit of Rs 1100. How much did he spend on repairs if he made a profit of 20%? 2949 05d1eeba8f5eae22172e6f3bf
5d1eeba8f5eae22172e6f3bf- 1Rs 400false
- 2Rs 440false
- 3Rs 500true
- 4Rs 550false
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Answer : 3. "Rs 500"
Q: What will be the compound interest on a sum of Rs.25,000 after 3 year at the rate of 12 percent per annum? 2017 05d1eeab6f5eae22172e6f3ba
5d1eeab6f5eae22172e6f3ba- 19000.30false
- 29720false
- 310483.20true
- 4None of thesefalse
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Answer : 3. "10483.20 "
Q: A sum was put at simple interest at a certain rate for 2 years. Had it been put at a 3% higher rate; it would have fetched Rs. 72 more. The sum is: 1402 15d1ee80af5eae22172e6f3b4
5d1ee80af5eae22172e6f3b4- 1Rs.1200true
- 2Rs.1500false
- 3Rs. 1600false
- 4Rs. 1800false
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Answer : 1. "Rs.1200"
Q: A man on tour travels first 160 km at 64 km/hr and the next 160 km at 80 km/hr. The Average speed for the the first 320 km of the tour is: 1168 05d1ee683f5eae22172e6f3a9
5d1ee683f5eae22172e6f3a9- 135.55 km/hrfalse
- 236 km/hrfalse
- 371.11 km/hrtrue
- 471 km/hrfalse
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Answer : 3. "71.11 km/hr"
Q: Seven men can complete a work in 12 days. They started the work and after 5 days, two men left. In how many days will the work be completed by the remaining men? 1697 05d1ee5e3f5eae22172e6f3a4
5d1ee5e3f5eae22172e6f3a4- 15false
- 26false
- 37false
- 4None of thesetrue
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Answer : 4. "None of these"
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