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A puzzle designed to be solved without using calculators, online decoders, or computer programming. Using a computer to type and post the answer is allowed; the spirit of this tag is to make people solve the puzzle on their own.

13 votes

Coke alphametic

Answer: Explanation: So the only solution is: Conclusion :
Marius's user avatar
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7 votes

Self-intro to mo-Roman numerals

Found it: My pseudo-strategy I've used a "learning algorithm" At first I took blind stabs at short words randomly, trying to use the smaller numbers IVXL That backfired quickly since the letters di …
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3 votes
Accepted

UVC wants to give you a Helping Hand in Solving these Unique Set of Pan digital Fractional-D...

From the second division: Further: Now we are left with... Now we got all:
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  • 18.2k
2 votes

An almost Shakespearian alphametic

Solution(s): Explanation In order to make it easier my explanation are going to be made in base 10. So if I say A+W = 10 this means in base 10, In base 9 it would be A+W = 11 (which is 10 in base …
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  • 18.2k
4 votes
Accepted

Devil in Different Disguises but in Prime Shape...Can you Figure out his Diverse Expressions?

. .
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8 votes

Alphametic between Kennedy and Nixon

Solution Long way: Starting at the top: Since the OP does not say that there are multiple answers I stopped after finding this. If the question get's modified and I have to find more resul …
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  • 18.2k
2 votes

A condemning alphametic

Solution: Proof:
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  • 18.2k
3 votes
Accepted

How many answers are there to this alphametic?

Partial answer / possible strategy. now finding the solutions: Next step. One possible way of doing so: This can go on until we find all possible combinations.
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  • 18.2k
8 votes

Split a number in half, sum it, square it and get the number back

The math way (added second) Let's say k is the number of digits... Write the equation like $ (x + y)^2 = 10^{\frac{k}{2}} x + y $ Transform this to a quadratic equation and try to find y based on x $ …
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  • 18.2k
3 votes
Accepted

Not MONEY but GIFT alphametic

Solution: Starting point [EDIT] now start filling in the blanks using the values we already know Case 1: Case 2. Case 3: Case 4: [EDIT] After Trenin's comment. Case 5 …
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2 votes

A set of lockers

Partial strategy, maybe someone can use it. Notation: 13H - means the coin for student 13 ends up "head" (very tempted to say "student 13 gets ..." you know where this is going). 24T - means the co …
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  • 18.2k
15 votes
Accepted

Last Digit of Multiplications

Solution 1: . Solution 2: .
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  • 18.2k
31 votes
Accepted

Breaking the record

My shot: In order to break that record: Example:
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  • 18.2k
5 votes

The Special Numbers

$ab=(a+b)^2$ B can be Next: $abc=(a+b+c)^3$ . And last one: $abcd=(a+b+c+d)^4$ .
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  • 18.2k
3 votes

Math is Awesome

Since this was solved for non-distinct digits, I'm trying to get the maximum out of "MATH" with distinct digits. So the first try is with So my seconds try is with So the final result:
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