A ladder hangs over the side of a ship anchored in a port. The bottom rung touches the water. The distance between rungs is 20 cm and the length of the ladder is 180 cm. The tide is rising at the rate of 15 cm each hour.
When will the water reach the seventh rung from the top?
67
Explanation: Alternate numbers increase by 2. 49 become 51 then 53 and so on. Similarly, 61 becomes 63 and then 65.
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Here come the best enigmas that appeared in the Batman movies - usually Riddler asking Bruce Wayne.
If you look at the number on my face you won't find thirteen anyplace.
One day on reaching school I found there were a total of 16 bicycles and tricycles parked in the school compound. I counted the total number of wheels to be 38. Find out the number of bicycles.
10 bicycles.
Explanation:: All the cycles will have at least 2 wheels, so 16 cycles will have 16x2=32 wheels. But in total there are 38 wheels. So the extra wheels (38-32=6) must be of the tricycles because bicycles have 2 wheels and tricycles have 3 wheels.
Therefore, the number of tricycles parked is 6 and hence the number of bicycles is 10.
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Forward I am heavy, but backward I am not. What am I?
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