Infosys Questions 1. Lucia is a wonderful grandmother.Her age is between 50 and 70.Each of her sons have as many sons as they have brothers.Their combined number gives Lucia’s age.What is the age? 2. There are two towers A and B.Their heights are 200ft and 150ft respectively and the foot of the towers are 250ft [...]

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Adam and Bob have exact speeds for walking and running – neither Adam outwalks Bob, nor Bob outruns Adam. But for a given distance, Adam runs half the time, then walks another half. Bob runs half the distance, then walks another half. If they were to compete, which distance would Adam win at, and which [...]

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how many trailing zeroes are there in 100! (100 factorial)? solution: 100! One per factor of 10, and one per factor of 5 (there are more than enough 2′s to pair with the 5′s), plus one per factor of ten squared (one occurrence) and one per factor of 5 squared (three occurrences). So if I’m [...]

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 bad king has a cellar of 1000 bottles of delightful and very expensive wine. a neighbouring queen plots to kill the bad king and sends a servant to poison the wine. (un)fortunately the bad king’s guards catch the servant after he has only poisoned one bottle. alas, the guards don’t know which bottle but know [...]

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