Question: A red light flashes 3 times per minute and a green light flashes 5 times in two minutes at regular intervals. If both lights start flashing at the same time, how many times do they flash together in each hour?
Correct Answer: A
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Question: A and B can do a piece of work in 21 and 24 days respectively. They started the work together and after some days A leaves the work and B completes the remaining work in 9 days. After how many days did A leave?
Correct Answer: B
Question: Ram, who is half as efficient as Krish, will take 24 days to complete a work if he worked alone. If Ram and Krish worked together, how long will they take to complete the work?
Correct Answer: C
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Question: A number is selected at random from first thirty natural numbers. What is the chance that it is a multiple of either 3 or 13?
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Question: What is the probability of getting at least one six in a single throw of three unbiased dice?
Correct Answer: D
Question: What is the probability that a two digit number selected at random will be a multiple of '3' and not a multiple of '5'?
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