6548
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584
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If Billy and Cyrus are wearing same coloured hats, Adam sitting on the top branch can instantaneously decipher that he (and Duke) are wearing the other colour, and can announce it right away. In that case, all others can also decipher colours of their own hats once Adam makes the announcement.
If Billy and Cyrus are wearing hats of different colours, Adam can’t decipher the colour of his hat because it can be either colour AND he can’t see Duke’s hat. In that case, Billy, who can see Cyrus, can deduce that he is wearing the other colour hat (other than which colour Cyrus is wearing). Subsequently, Cyrus can also decipher his own colour. Both Adam and Duke will remain unaware of their own colours.
- 39 views
- 2 answers
- 0 votes
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Start with two slices. After 30 Sec. (one side of both slices done), flip one of the slices, set the other slice aside and put the third slice on the pan. After 30 more sec., the first slice is fully done whereas the third slice is half done. Flip the third slice, remove the first slice and replace it with the second slice which was set aside earlier (half done). In 30 more seconds, both the slices are fully done. Total time taken: 90 Sec. (1 and 1/2 min.)
- 66 views
- 1 answers
- 0 votes
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Assuming that you usually reach the station on time to catch your train (i.e. with no time to spare) (because there is no mention of spare time in the question):
You won’t have been able to catch the train on that day however fast you drove the remaining distance!
Since your average speed was only half the required speed till you reached half-way. you will already have consumed the entire time required (at usual speed) to reach the station. By that time, the train would have reached the station. Time remaining till the train arrives is ZERO. No amount of fast driving will take you to the station in zero time. You missed the train.
- 70 views
- 1 answers
- 0 votes
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If ‘n2’ in the question means n^2, answer is 9376
9376 ^ 2 = 9376 * 9376 = 87909376
- 75 views
- 1 answers
- 0 votes
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Red E + 4 ANYTHING => Ready for Anything
- 73 views
- 1 answers
- 0 votes
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Solution 1: (If you DON’T have to start measuring immediately) Start both hourglasses together. When the 7-min one runs out, start measuring. At that time, the 11-min one will have 4 min. left. After the 11-min one runs out (i.e., 4 min. from starting the measurement), invert it and run it till it runs out (11 min.), completing 15 min.
Solution 2: (If immediate start is required) Start both the hourglasses together and start measuring. When the 7-min one runs out, invert. At that moment, the 11-min. one will have 4 min. left. Let the 7-min. glass run till the 11-min. one runs out. (Time since start = 11 min.) By this time, the 7-min. glass will have run it for 4 min. since it was inverted. Invert it once again and let it run till it runs out, adding 4 more min., completing 15 min.
- 91 views
- 1 answers
- 0 votes
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BAD in TENTION => Bad Intention
- 85 views
- 1 answers
- 0 votes
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5196751830
6 x (6 – 3) = 18
18 x (18 – 3) = 270
270 x (270 – 3) = 72090
72090 x (72090 – 3) = 5196751830- 91 views
- 1 answers
- 0 votes
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Arrange them in a star-like configuration, with tips touching each other.
- 96 views
- 1 answers
- 0 votes
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The question asks to “move” one matchstick. ‘Move’ doesn’t necessarily mean that it should be moved to anywhere within the given equation / statement. Hence:
Remove the middle stick of the ‘8’ to make it ‘0’, making the statement 6 – 6 = 0, which is true. Otherwise – if the stick must be placed within the statement – move the lower left stick of ‘8’ (to make it ‘9’) and place it over the ‘=’ symbol, making it an inequality, which is also true.
- 104 views
- 1 answers
- 0 votes