Learning category
Useful concepts and preparation material for competitive examinations.
Q. A is twice as efficient as B. If B alone can complete a work in 24 days, in how many days can A and B together complete the work? Options: a) 6 da…
Q. A train running at 90 km/h crosses a 250-metre-long platform in 20 seconds. What is the length of the train? Options: A) 200 m | B) 225 m | C) 250…
Q. A shopkeeper sells two articles for ₹1,200 each. On one article he gains 20%, while on the other he loses 20%. What is the overall result? Options…
Q. 20 men can complete a piece of work in 15 days. After working for 5 days, 5 men leave the work. How many more days will the remaining men take to…
Q. Two persons start from the same point in opposite directions at speeds of 5 km/h and 7 km/h. How far apart will they be after 2.5 hours? Options:…
Q. By selling an article for ₹1,700, a trader incurs a loss of 15%. At what price should he sell it to earn a profit of 10%? Options: A) ₹2,000 | B)…
Q. A and B can complete a job in 12 days, B and C in 15 days, and A and C in 20 days. In how many days can A, B and C together complete the job? Opti…
Q. A person covers half of a journey at 40 km/h and the remaining half at 60 km/h. What is his average speed for the whole journey? Options: A) 45 km…
Q. A trader marks an article 25% above its cost price and then gives a discount of 10% on the marked price. What is his profit percentage? Options: A…
Q. A can complete a work in 18 days and B in 9 days. If both work together for 3 days, what fraction of the work remains? Options: A) 1/3 | B) 1/2 |…
Q. A train 180 metres long is travelling at 54 km/h. How much time will it take to cross a pole? Options: A) 10 seconds | B) 12 seconds | C) 15 secon…
Q. An article is sold for ₹760 at a loss of 5%. What is its cost price? Options: A) ₹780 | B) ₹800 | C) ₹820 | D) ₹840 ✅ Answer: B) ₹800 (CP = SP ÷ 0…