# Grail Insights Interview Questions

###### Two pipes C and D can fill a tank in 36 hours and 45 hours respectively. If both the pipes are opened simultaneously, how much time will be taken to fill the tank? A. 10 hours B. 20 hours C. 30 hours D. 40 hours
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###### What decimal of an hour is a second A. 0.0027 B. 0.047 C. 0.0270 D. 0.0720
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###### How many times does the 29th day of the month occur in 400 consecutive years? A. 4487 times B. 4457 times C. 4497 times D. 4447 times
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###### A company pays 12.5% dividend to its investors. If an investor buys Rs.50 shares and gets 25% on investment, at what price did the investor buy the shares? A. 5 B. 15 C. 25 D. 35
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###### If a card is chosen from a standard deck of cards, what is the probability of getting a five or a seven? A. 7/52 B. 8/52 C. 9/52 D. 10/52
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###### Find the odd man out. 23, 27, 36, 52, 77, 111, 162 A. 111 B. 222 C. 333 D. 444
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###### A clock strikes 4 taking 9 seconds. In order to strike 12 at the same rate, the time taken is A. 13 seconds B. 23 seconds C. 33 seconds D. 43 seconds
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