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pretorik |
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markr |
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Gordon Weir |
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mbloomfi |
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Dennis Nazarov |
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zzz123 |
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Srikanta |
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lidSpelunker |
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SAMIH FAHMY |
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jkr |
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denisR, mishik |
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alan, De_Bill |
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dddfff |
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kavfy |
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idler_ |
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akajobe |
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tolstyi |
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STARuK |
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vale |
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xandr |
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A Megamind has ordered a set of steel balls for his scientific
experiments: 2 red, 2 orange, 2 yellow, 2 green, and 2 blue.
The order was fulfilled but the balls of some color were made 1g
lighter than the others. The Megamind has a balance scale
that shows the exact weight differential between the two cups. He
needs to determine the defective color using one weighing.
Please, help the Megamind to do this. |
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Puzzle statistics "Defective balls".
Last updated 6891996.7 minutes ago.
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Solved by: 22
Daily average: 0
Answers submitted: 24
Viewed by: 257
Fraction solved by: 8.5%
Solved at first attempt: 95.4%
Average discussion length: 1.1
Liked the puzzle: 7
Did not like the puzzle:
0
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An elevator button |
Logic puzzles |
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Weight: 1 |
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Liked the puzzle: 87% |
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12.03.2011 |
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A 12 story building has a single elevator. Two people live on the first floor, four - on the second floor, et cetera. Which button in the elevator is most frequently pushed? |
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Puzzle statistics "An elevator button".
Last updated 6891996.7 minutes ago.
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Solved by: 10
Daily average: 0
Answers submitted: 11
Viewed by: 38
Fraction solved by: 26.3%
Solved at first attempt: 100%
Average discussion length: 1.0
Liked the puzzle: 7
Did not like the puzzle:
1
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A house has four walls each facing South. Each wall has a window. A bear is seen in a window. What color is the bear? |
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Puzzle statistics "A bear in a window".
Last updated 6891996.7 minutes ago.
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Solved by: 21
Daily average: 0
Answers submitted: 23
Viewed by: 35
Fraction solved by: 60%
Solved at first attempt: 90.4%
Average discussion length: 1.0
Liked the puzzle: 4
Did not like the puzzle:
2
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A Megamind was doing his laundry. The washer's manual says that a
standard load of detergent is 220 g. The Megamind has
a bag of dry detergent containing exactly 1 kg, the balance scale, and
four weights: 2x10 g and 2x5 g. How can the Megamind
obtain exactly 220 grams of detergent using at most three weighings? |
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Puzzle statistics "Laundry".
Last updated 6891996.7 minutes ago.
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Solved by: 1
Daily average: 0
Answers submitted: 1
Viewed by: 1
Fraction solved by: 100%
Solved at first attempt: 100%
Average discussion length: 1.0
Liked the puzzle: 5
Did not like the puzzle:
1
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Indeterminate color |
Riddles, jokes |
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Weight: 1 |
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Liked the puzzle: 50% |
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19.03.2011 |
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A certain subject caught the attention of a walking couple. They
started to argue. He said: It's red.
She said: No, it's black. He shot back: Yeah? Then why is it white? She
replied: Because it's green, silly.
What are they arguing about? |
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Puzzle statistics "Indeterminate color".
Last updated 6891996.7 minutes ago.
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Solved by: 1
Daily average: 0
Answers submitted: 1
Viewed by: 1
Fraction solved by: 100%
Solved at first attempt: 100%
Average discussion length: 1.0
Liked the puzzle: 1
Did not like the puzzle:
1
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Links and chains |
Logic puzzles |
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Weight: 1 |
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Liked the puzzle: 100% |
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02.04.2011 |
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Once upon a time, a Megamind worked as a smith. He was brought 5
chains each consisting of 3 links. What is the minimal number of links
that the Megamind should re-lock to make one long chain? |
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Puzzle statistics "Links and chains".
Last updated minutes ago.
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Solved by:
Daily average:
Answers submitted:
Viewed by:
Fraction solved by: %
Solved at first attempt: %
Average discussion length:
Liked the puzzle:
Did not like the puzzle:
0
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A Megamind on his treasure hunt discovered a cave with six ancient
vases. Unfortunately, instead of treasures, the vases contained
beads. The first vase had 60 beads, the second had 30 beads, the third
had 20 beads, and the fourth had 15 beads. How many beads were in the
fifth and the sixth vases, given that these number form a certain
pattern? |
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Puzzle statistics "Vases and beads".
Last updated minutes ago.
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Solved by:
Daily average:
Answers submitted:
Viewed by:
Fraction solved by: %
Solved at first attempt: %
Average discussion length:
Liked the puzzle:
Did not like the puzzle:
0
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Place numbers 1,2,.., 9 without repetitions into a 3x3 square so that
the sums in all rows, columns, and diagonals are all equal. |
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Puzzle statistics "Numbers in a square".
Last updated minutes ago.
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Solved by:
Daily average:
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Viewed by:
Fraction solved by: %
Solved at first attempt: %
Average discussion length:
Liked the puzzle:
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0
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Using numbers 1,3,4,6, and basic arithmetic operations (addition,
subtraction, multiplication, and division) and parentheses, obtain and
expression that evaluates to 24. You may use only these numbers and
only these operations. Every number should be used exactly once.
Numbers cannot be concatenated, i.e. you cannot use 13 or 146. |
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Puzzle statistics "Obtain 24".
Last updated 6891996.7 minutes ago.
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Solved by: 48
Daily average: 0
Answers submitted: 55
Viewed by: 296
Fraction solved by: 16.2%
Solved at first attempt: 87.5%
Average discussion length: 1.2
Liked the puzzle: 13
Did not like the puzzle:
0
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A Megamind is lost in the mountains. He is standing on a path,
shouting for help.
Finally, he sees a local approaching. Megamind knows that the locals
can be knights that always tell the truth, or knaves that always lie.
He also knows that the path leads to the village of knights in one
direction and to the village of knaves in the other. The problems is
that the knaves are also hateful of Megaminds, and will stone him if
gets to their village. How can Megamind ask one question and determine
the right way to go? |
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Puzzle statistics "Two villages".
Last updated 6891996.7 minutes ago.
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Solved by: 37
Daily average: 0
Answers submitted: 47
Viewed by: 296
Fraction solved by: 12.5%
Solved at first attempt: 83.7%
Average discussion length: 1.4
Liked the puzzle: 11
Did not like the puzzle:
0
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