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In ornare lacus sit amet est aliquet ac tincidunt tellus semper. Pellentesque habitant morbi tristique senectus et netus et malesuada fames ac turpis egestas.

Thursday, September 19, 2013

Matchstick Frame

There are five squares (one 3x3 and four 1x1) formed with 20 matchsticks, as shown in the illustration. Move two matchstick to get seven squares. Overlapping or breaking of matchsticks or "loose ends" are not allowed.






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Answer:

Seven squares are formed: five 1x1 squares, one 2x2 square, and one 3x3 square.




Cut a 3x3 Cube

Cut a 3x3 CubeImagine a 3x3x3 cube. 

How many cuts do we need to break it into 27 1x1x1 cubes? 

A cut may go through multiple pieces.







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Answer :

The central 1x1x1 cube has six faces.

Any cut can only reveal one of these faces!

So six cuts are needed, and also are enough.

Thursday, October 11, 2012

Friday, October 5, 2012

Which letter replaces the ?



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Answer
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G
Explanation
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Starting with the letters in the top row, and following straight lines through the middle circle, subtract the numerical value of the middle letter (G) and write the letter with the corresponding numerical value in the lower circle.

Which letter replaces the ?


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Answer
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K
Explanation
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The numerical values of the letters in opposite segments of the circle always add up to 17.

What time should the last watch show????


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Answer
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5:19
Explanation
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Starting with the watch on the left, add 42 minutes to the time shown to give the time on the next watch to the right.