Kevin
  • Member for 7 years, 8 months
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A 600 foot Rope, and an 800 foot Drop
Accepted answer
31 votes

First, tie one end of the rope to the to hook and climb down to the ledge. Cut (without dropping) the rope that hangs below the ledge, then climb back to the roof carrying the extra rope that you cut. ...

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Queue in the bank
Accepted answer
6 votes

Here's a long, rather brute-force calculation: There is a $\frac{1}{6}$ chance that the first person to check his ticket has ticket #6. If this is the case, then the men win the game if they happen ...

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Riddle ... I don't know
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5 votes

I believe the answer is It matches the title: "I'm there when you're born." "Yet I begin to fade away from day one." "I will stay until death even if you choose to erase me." "Maybe even more, if ...

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How can we compute the 6 missing numbers?
4 votes

These tables are examples of lattice multiplication. Ignoring the diagonal lines, the numbers in each of the squares is the product of the number at the top of its column and the number at the right ...

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How do I solve these 3x3 magic squares?
3 votes

Here is an alternative technique. Consider your first magic square: | a | 5 | b | | c | d | e | | 8 | f | g | I filled in the empty cells with the variables $a$ through $g$. We will create a system ...

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Hungry, hungry _____
3 votes

The answer is The answer fits the title, "Hungry Hungry _____." When my owner is closed, I am open When you press the lever for your hippo closed, the hippo opens its mouth. My owner never ...

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Assumption Needed when Solving Puzzle
3 votes

As someone with a little bit more of a math background, I call these assumptions constraints. The word comes from optimization, a field studied by both computer scientists and mathematicians. When you ...

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Let's play tag!
2 votes

It's not as sensational as the other answers, but there's a genuine, mathematically sound argument to be made that the answer is simply The distance $d_{you}$ you've traveled after $n$ turns is $d_{...

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Computer Crisis Takeover! [Part 1]
1 votes

What if we concatenate the decimal representations of all three colors, in the order they appear on the screen? Yellow is 2552550 Blue is 00255 Red is 25500 If each of the RBG values needs to be ...

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