Question
Three streetlights flash together. Each of them then
flashes after 0.35 seconds, 0.2 seconds, and 0.105 seconds respectively. After how many seconds will they all flash together again?Solution
0.35, 0.2, 0.105 multiplied by 0.001. 350,200,105 LCM of 350,200,105=4200 4200 × 0.001=4.2 =4.2
More HCF and LCM Questions
- A windmill rotates 60 times in 1.5 hours. Find the number of rotations made by the windmill in 36 minutes.
A shopkeeper can make a profit of 30% by selling an article for Rs. 390. If he wants to make a profit of 50% even after allowing a discount of 25%, then...
- The present ages of Priya and Tina are in the ratio 2:5, respectively. Eight years hence, the ratio of their ages will become 5:11. Find the present age of...
- In a group, if 3 people with an average weight of 70 kg leave, the average weight of the remaining group drops by 2 kg. However, if 4 people of average wei...
- A car moves from city ‘A’ to city ‘B’ at 50 km/h and returns back from city ‘B’ to city ‘A’ at 75 km/h. Find the car’s average speed duri...
- The product of two decimals is 0.675. If one of the decimals is 2.5, then find the other decimal.
- ‘Amit’ is 1.5 times as efficient as ‘Bhuvan’, who is 1/3 as efficient as ‘Chirag’. If Amit and Chirag together complete a work in 18 days, how ...
- Two successive discounts of 25% and 10% is equivalent to a single discount of how much percentage?
- Find the difference between the compound interest earned on Rs. 12,000 for 2 years at 10% p.a., compounded annually, and the simple interest earned on Rs. ...
Relevant for Exams:
